Vaccines

On December 16, 2021, the Advisory Committee on Immunization Practices (ACIP) voted to preferentially recommend messenger RNA (mRNA) vaccines over the Johnson & Johnson/Janssen (J&J) COVID-19 (Ad.26.COV2.S) adenovirus vector vaccine for prevention of COVID-19.¹ The mRNA vaccines include Pfizer-BioNTech COVID-19 (BNT162b2) and Moderna COVID-19 (mRNA-1273).

The reason for this preferential recommendation is a rare but serious adverse reaction—thrombosis with thrombocytopenia (TTS) —that has been associated with the J&J vaccine. As of December 8, 2021, more than 16.9 million doses of the J&J COVID-19 vaccine have been given in the United States. The CDC has identified 57 confirmed reports of people who received this vaccine and later developed TTS.² The known incidence of TTS is thus 1 per ~ 300,000 doses, although the rate may actually be higher.² All cases have been documented as having occurred after administration of the J&J primary single-dose vaccine; none have been documented (so far) after the booster—although the number of booster doses of the J&J COVID-19 vaccine has been small.

Women between the ages of 30 and 50 years have the highest risk for TTS, with rates of 1 per 94,000 in those ages 30-39 and 1 per 111,000 for those ages 40-49.^2,3 All those with TTS have been hospitalized, and 9 have died.^2,3 While this adverse reaction is rare, the seriousness of it led the ACIP to state a preference for the mRNA vaccines.

The significance of the recommendation:

• Unless a person has a contraindication to an mRNA vaccine, they should receive 1 of these 2 vaccines for their primary series and boosters.
• The only “Mix and Match” that should occur with boosters is to follow a J&J/Janssen COVID-19 vaccine with an mRNA booster. At this time, booster doses following a 2-dose mRNA primary series should be with an mRNA vaccine.
• The recommendation is for adults ages 18 and older; however, the J&J/Janssen COVID-19 vaccine is not yet approved for younger age-groups.
• The J&J/Janssen COVID-19 vaccine remains an option for those who cannot receive an mRNA vaccine, but it should be administered only after full informed consent.

The J&J/Janssen COVID-19 vaccine initially looked promising a year ago because of its single-dose primary series and its much less stringent storage requirements. However, things have not quite panned out for the vaccine. Its effectiveness after a single dose has proven to be significantly inferior to the 2-dose mRNA vaccines, and it has now been associated with a very serious, albeit rare, adverse reaction.

The major take-home point for physicians to pass on to their patients is that the nation’s system for monitoring vaccine safety works. It can pick up serious adverse reactions that occur at a rate as low as 1/300,000. This should be reassuring.

On December 16, 2021, the Advisory Committee on Immunization Practices (ACIP) voted to preferentially recommend messenger RNA (mRNA) vaccines over the Johnson & Johnson/Janssen (J&J) COVID-19 (Ad.26.COV2.S) adenovirus vector vaccine for prevention of COVID-19.¹ The mRNA vaccines include Pfizer-BioNTech COVID-19 (BNT162b2) and Moderna COVID-19 (mRNA-1273).

The reason for this preferential recommendation is a rare but serious adverse reaction—thrombosis with thrombocytopenia (TTS) —that has been associated with the J&J vaccine. As of December 8, 2021, more than 16.9 million doses of the J&J COVID-19 vaccine have been given in the United States. The CDC has identified 57 confirmed reports of people who received this vaccine and later developed TTS.² The known incidence of TTS is thus 1 per ~ 300,000 doses, although the rate may actually be higher.² All cases have been documented as having occurred after administration of the J&J primary single-dose vaccine; none have been documented (so far) after the booster—although the number of booster doses of the J&J COVID-19 vaccine has been small.

Women between the ages of 30 and 50 years have the highest risk for TTS, with rates of 1 per 94,000 in those ages 30-39 and 1 per 111,000 for those ages 40-49.^2,3 All those with TTS have been hospitalized, and 9 have died.^2,3 While this adverse reaction is rare, the seriousness of it led the ACIP to state a preference for the mRNA vaccines.

The significance of the recommendation:

• Unless a person has a contraindication to an mRNA vaccine, they should receive 1 of these 2 vaccines for their primary series and boosters.
• The only “Mix and Match” that should occur with boosters is to follow a J&J/Janssen COVID-19 vaccine with an mRNA booster. At this time, booster doses following a 2-dose mRNA primary series should be with an mRNA vaccine.
• The recommendation is for adults ages 18 and older; however, the J&J/Janssen COVID-19 vaccine is not yet approved for younger age-groups.
• The J&J/Janssen COVID-19 vaccine remains an option for those who cannot receive an mRNA vaccine, but it should be administered only after full informed consent.

The J&J/Janssen COVID-19 vaccine initially looked promising a year ago because of its single-dose primary series and its much less stringent storage requirements. However, things have not quite panned out for the vaccine. Its effectiveness after a single dose has proven to be significantly inferior to the 2-dose mRNA vaccines, and it has now been associated with a very serious, albeit rare, adverse reaction.

The major take-home point for physicians to pass on to their patients is that the nation’s system for monitoring vaccine safety works. It can pick up serious adverse reactions that occur at a rate as low as 1/300,000. This should be reassuring.

On December 16, 2021, the Advisory Committee on Immunization Practices (ACIP) voted to preferentially recommend messenger RNA (mRNA) vaccines over the Johnson & Johnson/Janssen (J&J) COVID-19 (Ad.26.COV2.S) adenovirus vector vaccine for prevention of COVID-19.¹ The mRNA vaccines include Pfizer-BioNTech COVID-19 (BNT162b2) and Moderna COVID-19 (mRNA-1273).

The reason for this preferential recommendation is a rare but serious adverse reaction—thrombosis with thrombocytopenia (TTS) —that has been associated with the J&J vaccine. As of December 8, 2021, more than 16.9 million doses of the J&J COVID-19 vaccine have been given in the United States. The CDC has identified 57 confirmed reports of people who received this vaccine and later developed TTS.² The known incidence of TTS is thus 1 per ~ 300,000 doses, although the rate may actually be higher.² All cases have been documented as having occurred after administration of the J&J primary single-dose vaccine; none have been documented (so far) after the booster—although the number of booster doses of the J&J COVID-19 vaccine has been small.

Women between the ages of 30 and 50 years have the highest risk for TTS, with rates of 1 per 94,000 in those ages 30-39 and 1 per 111,000 for those ages 40-49.^2,3 All those with TTS have been hospitalized, and 9 have died.^2,3 While this adverse reaction is rare, the seriousness of it led the ACIP to state a preference for the mRNA vaccines.

The significance of the recommendation:

• Unless a person has a contraindication to an mRNA vaccine, they should receive 1 of these 2 vaccines for their primary series and boosters.
• The only “Mix and Match” that should occur with boosters is to follow a J&J/Janssen COVID-19 vaccine with an mRNA booster. At this time, booster doses following a 2-dose mRNA primary series should be with an mRNA vaccine.
• The recommendation is for adults ages 18 and older; however, the J&J/Janssen COVID-19 vaccine is not yet approved for younger age-groups.
• The J&J/Janssen COVID-19 vaccine remains an option for those who cannot receive an mRNA vaccine, but it should be administered only after full informed consent.

The J&J/Janssen COVID-19 vaccine initially looked promising a year ago because of its single-dose primary series and its much less stringent storage requirements. However, things have not quite panned out for the vaccine. Its effectiveness after a single dose has proven to be significantly inferior to the 2-dose mRNA vaccines, and it has now been associated with a very serious, albeit rare, adverse reaction.

The major take-home point for physicians to pass on to their patients is that the nation’s system for monitoring vaccine safety works. It can pick up serious adverse reactions that occur at a rate as low as 1/300,000. This should be reassuring.

Pfizer’s COVID-19 vaccine for children ages 2 to 5 years old fizzled in clinical trials, the company said on Friday, signaling a further delay in getting a vaccine to preschoolers just as Omicron bears down on the U.S.

In a news release, Pfizer reported that while its 3-microgram dose – which is less than one-third of the dose given to older children – generated a protective immune response in babies and toddlers ages 6 to 24 months, it didn’t generate adequate immunity in children ages 2 to 5.

The company plans to change its clinical trial to add a third dose for younger children in hopes of improving those results. It also plans to test a third dose of its 10-microgram vaccine for children ages 5 to 12.

If the trials are successful, Pfizer said it would submit data to the FDA for an emergency use authorization (EUA) in the first half of 2022.

That pushes the timeline of getting a vaccine to younger children back by several months. In November, Anthony Fauci, MD, head of the National Institute of Allergy Infectious Diseases, predicted a vaccine would be ready for preschoolers by spring.

“On one hand, parents are understandably disappointed,” said Jill Foster, MD, a pediatric infectious disease doctor at the University of Minnesota Medical School. “On the other, it shows that the system for testing vaccines is working. Children are not little adults and have complex immune systems, so it’s not just a matter of making the dose smaller and expecting that it will work,” she said, noting that data from Moderna’s KidCOVE study in preschoolers is pending.

Until there’s a vaccine, Dr. Foster says parents should protect babies and toddlers by making sure everyone around them is vaccinated, promote the use of face masks for everyone around them and for all children over age 2, and continue to avoid crowded gatherings, particularly those that are indoors.

“Hand sanitizer is important, but this virus, especially the Omicron variant, is very easily spread through the air, so keep the air clear of virus as much as possible,” she said.

While the youngest children are still waiting for an effective vaccine, there was reassuring news Dec. 16 about the safety of Pfizer’s vaccine for school-aged kids – those ages 5 through 11.

Out of more than 7 million doses given since this vaccine was authorized for emergency use in late October, most reactions to the vaccine – including arm pain, swelling, and fatigue – have been mild and gone away quickly, without the need to miss school or see a doctor, the CDC reported to a meeting of its Advisory Committee on Immunization Practices, or ACIP.

Many experts had been waiting to see if this vaccine would cause rare cases of heart inflammation called myocarditis, as a higher dose did in teens and young adults.

The news on this front was excellent. About 6 weeks after this vaccine became available, the CDC says there have been only eight confirmed cases of myocarditis in this age group. Six more cases are under investigation.

To put this risk into context, data collected by the American Academy of Pediatrics and the Children’s Hospital Association shows that about 1% of children who test positive for COVID-19 are hospitalized for their infections, while the risk of getting a case of myocarditis after vaccination is .0002%, making it about 5,000 times more likely that a child would need to be hospitalized for COVID-19 than for myocarditis after vaccination.

John Su, MD, who is a member of the CDC’s Vaccine Safety Team, reported there had been two deaths in children after a COVID-19 vaccination. Both were girls, ages 5 and 6. Both had complicated medical histories for several medical disorders. It’s not clear their deaths were linked to the vaccine, and the causes of their deaths are still under investigation.

A version of this article first appeared on WebMD.com.

Pfizer’s COVID-19 vaccine for children ages 2 to 5 years old fizzled in clinical trials, the company said on Friday, signaling a further delay in getting a vaccine to preschoolers just as Omicron bears down on the U.S.

In a news release, Pfizer reported that while its 3-microgram dose – which is less than one-third of the dose given to older children – generated a protective immune response in babies and toddlers ages 6 to 24 months, it didn’t generate adequate immunity in children ages 2 to 5.

The company plans to change its clinical trial to add a third dose for younger children in hopes of improving those results. It also plans to test a third dose of its 10-microgram vaccine for children ages 5 to 12.

If the trials are successful, Pfizer said it would submit data to the FDA for an emergency use authorization (EUA) in the first half of 2022.

That pushes the timeline of getting a vaccine to younger children back by several months. In November, Anthony Fauci, MD, head of the National Institute of Allergy Infectious Diseases, predicted a vaccine would be ready for preschoolers by spring.

“On one hand, parents are understandably disappointed,” said Jill Foster, MD, a pediatric infectious disease doctor at the University of Minnesota Medical School. “On the other, it shows that the system for testing vaccines is working. Children are not little adults and have complex immune systems, so it’s not just a matter of making the dose smaller and expecting that it will work,” she said, noting that data from Moderna’s KidCOVE study in preschoolers is pending.

Until there’s a vaccine, Dr. Foster says parents should protect babies and toddlers by making sure everyone around them is vaccinated, promote the use of face masks for everyone around them and for all children over age 2, and continue to avoid crowded gatherings, particularly those that are indoors.

“Hand sanitizer is important, but this virus, especially the Omicron variant, is very easily spread through the air, so keep the air clear of virus as much as possible,” she said.

While the youngest children are still waiting for an effective vaccine, there was reassuring news Dec. 16 about the safety of Pfizer’s vaccine for school-aged kids – those ages 5 through 11.

Out of more than 7 million doses given since this vaccine was authorized for emergency use in late October, most reactions to the vaccine – including arm pain, swelling, and fatigue – have been mild and gone away quickly, without the need to miss school or see a doctor, the CDC reported to a meeting of its Advisory Committee on Immunization Practices, or ACIP.

Many experts had been waiting to see if this vaccine would cause rare cases of heart inflammation called myocarditis, as a higher dose did in teens and young adults.

The news on this front was excellent. About 6 weeks after this vaccine became available, the CDC says there have been only eight confirmed cases of myocarditis in this age group. Six more cases are under investigation.

To put this risk into context, data collected by the American Academy of Pediatrics and the Children’s Hospital Association shows that about 1% of children who test positive for COVID-19 are hospitalized for their infections, while the risk of getting a case of myocarditis after vaccination is .0002%, making it about 5,000 times more likely that a child would need to be hospitalized for COVID-19 than for myocarditis after vaccination.

John Su, MD, who is a member of the CDC’s Vaccine Safety Team, reported there had been two deaths in children after a COVID-19 vaccination. Both were girls, ages 5 and 6. Both had complicated medical histories for several medical disorders. It’s not clear their deaths were linked to the vaccine, and the causes of their deaths are still under investigation.

A version of this article first appeared on WebMD.com.

Pfizer’s COVID-19 vaccine for children ages 2 to 5 years old fizzled in clinical trials, the company said on Friday, signaling a further delay in getting a vaccine to preschoolers just as Omicron bears down on the U.S.

In a news release, Pfizer reported that while its 3-microgram dose – which is less than one-third of the dose given to older children – generated a protective immune response in babies and toddlers ages 6 to 24 months, it didn’t generate adequate immunity in children ages 2 to 5.

The company plans to change its clinical trial to add a third dose for younger children in hopes of improving those results. It also plans to test a third dose of its 10-microgram vaccine for children ages 5 to 12.

If the trials are successful, Pfizer said it would submit data to the FDA for an emergency use authorization (EUA) in the first half of 2022.

That pushes the timeline of getting a vaccine to younger children back by several months. In November, Anthony Fauci, MD, head of the National Institute of Allergy Infectious Diseases, predicted a vaccine would be ready for preschoolers by spring.

“On one hand, parents are understandably disappointed,” said Jill Foster, MD, a pediatric infectious disease doctor at the University of Minnesota Medical School. “On the other, it shows that the system for testing vaccines is working. Children are not little adults and have complex immune systems, so it’s not just a matter of making the dose smaller and expecting that it will work,” she said, noting that data from Moderna’s KidCOVE study in preschoolers is pending.

Until there’s a vaccine, Dr. Foster says parents should protect babies and toddlers by making sure everyone around them is vaccinated, promote the use of face masks for everyone around them and for all children over age 2, and continue to avoid crowded gatherings, particularly those that are indoors.

“Hand sanitizer is important, but this virus, especially the Omicron variant, is very easily spread through the air, so keep the air clear of virus as much as possible,” she said.

While the youngest children are still waiting for an effective vaccine, there was reassuring news Dec. 16 about the safety of Pfizer’s vaccine for school-aged kids – those ages 5 through 11.

Out of more than 7 million doses given since this vaccine was authorized for emergency use in late October, most reactions to the vaccine – including arm pain, swelling, and fatigue – have been mild and gone away quickly, without the need to miss school or see a doctor, the CDC reported to a meeting of its Advisory Committee on Immunization Practices, or ACIP.

Many experts had been waiting to see if this vaccine would cause rare cases of heart inflammation called myocarditis, as a higher dose did in teens and young adults.

The news on this front was excellent. About 6 weeks after this vaccine became available, the CDC says there have been only eight confirmed cases of myocarditis in this age group. Six more cases are under investigation.

To put this risk into context, data collected by the American Academy of Pediatrics and the Children’s Hospital Association shows that about 1% of children who test positive for COVID-19 are hospitalized for their infections, while the risk of getting a case of myocarditis after vaccination is .0002%, making it about 5,000 times more likely that a child would need to be hospitalized for COVID-19 than for myocarditis after vaccination.

John Su, MD, who is a member of the CDC’s Vaccine Safety Team, reported there had been two deaths in children after a COVID-19 vaccination. Both were girls, ages 5 and 6. Both had complicated medical histories for several medical disorders. It’s not clear their deaths were linked to the vaccine, and the causes of their deaths are still under investigation.

A version of this article first appeared on WebMD.com.

An updated recommendation from the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices (ACIP) calling for universal hepatitis B vaccination of all adults aged 59 and younger has boosted the call to improve clinicians’ awareness of the increasing infection and low vaccination rates – and raise the issue with patients.

“This new recommendation from [the] ACIP will be instrumental [in] raising adult hepatitis B vaccination rates in the U.S. to levels that will allow us to finally eliminate hepatitis B in this country,” said Rita K. Kuwahara, MD, a primary care internal medicine physician and health policy fellow at Georgetown University, in Washington, D.C., in addressing the issue at the U.S. Conference on HIV/AIDS (USCHA) this month.

“We have the tools to prevent hepatitis B, and since we have such safe and highly effective vaccines to protect against community [spread], we should not have a single new infection in our nation,” she asserted.

The unanimously approved updated ACIP recommendation was issued in November and still requires adoption by the CDC director. The ACIP specifically recommends that adults aged 19 to 59 and those 60 years and older with risk factors for infection “should” receive the hepatitis B vaccine, and it further stipulates that those 60 years and older without known risk factors for hepatitis B “may” receive the vaccine.

The recommendation was previously only for adults at risk for hepatitis B infection due to a variety of factors, including sexual exposure, percutaneous or mucosal exposure to blood, hepatitis C infection, chronic liver disease, end-stage renal disease, and HIV infection.

“The number of risk factors was long, and for a busy primary care provider to have to go through a lengthy risk-based protocol like that, it may not happen,” Dr. Kuwahara told this news organization.

“Now we have a really helpful new recommendation that is simply age based, and clinicians can just tell patients that if they were born before this certain period, a hepatitis B vaccination is recommended.”

The change comes amid a troubling trajectory of hepatitis B, with up to 2.4 million individuals currently having chronic hepatitis B in the U.S. and infection rates soaring by 100% to more than 400% in states with high opioid use, such as West Virginia, Kentucky, Tennessee, and Maine, Dr. Kuwahara said.

Notably, hepatitis B is the leading cause of liver disease, and one in four individuals with unmanaged chronic hepatitis B goes on to develop liver failure and/or cirrhosis or liver cancer, which has a 5-year survival rate of only 18%.

Despite the rising infection rates, only 25%-30% of adults in the U.S. are reported to be currently vaccinated for hepatitis B, even though safe and highly effective vaccines are available, notably including a new two-dose vaccine (Heplisav-B) that can be provided over just a month (vs. other hepatitis B vaccines requiring 3 doses over 6 months).
 

Clinician awareness of low vaccination rates lacking

Dr. Kuwahara noted that awareness among clinicians of the issues surrounding hepatitis B appears low, with one small survey that she and her colleagues conducted of 30 primary care physicians showing that not one of the respondents was aware of the low vaccination rate.

Dr. Kuwahara says a key reason for the low awareness to discuss the hepatitis B vaccination with adults is the common impression that the responsibility for the vaccination lies in the hands of pediatricians.

But that’s only half correct – universal vaccination for hepatitis B in all infants and children is indeed currently the policy in the U.S. – but that was not implemented in all states until the mid-to-late ‘90s, meaning the millions of adults over the age of about 25 to 30, born before that period, are likely not fully vaccinated against hepatitis B.

“When I was in medical school, there wasn’t a lot of discussion of how low the hepatitis B vaccination rate was because everyone knew there was universal childhood vaccination, and I think there was an assumption that it had been going on for a long time,” Dr. Kuwahara said. “So I think it’s clearly a misconception, and it’s really important to improve clinician awareness around the issue.”
 

Opioid use a key factor in rising infection rates

Importantly, a large proportion of opioid users are among the population of patients born before the mid-’90s – and those adults have a particularly high risk of transmission, with data indicating that 36% of new hepatitis B infections are the result of the opioid epidemic, Dr. Kuwahara noted.

“In the opioid epidemic, we have seen some of the greatest increases in acute hepatitis B presenting in adults aged 30 to 49 years old, as most adults in this age range would not have been vaccinated as children in the U.S.,” she said.

Approximately two-thirds of individuals with chronic hepatitis B are reportedly not even aware of their infection status due to ineffective prevention and vaccination programs, adding to the spread of infection, Dr. Kuwahara said.

Meanwhile, COVID-19 has only exacerbated the problem, with record-high instances of overdoses and overdose-related deaths during the pandemic, she explained.

However, the pandemic, and specifically the sweeping innovations that have been implemented in desperate efforts to bring COVID-19 vaccines to the public, could in fact represent a critical opportunity for hepatitis B prevention, Dr. Kuwahara said.

“Significant resources and federal funding have already been invested to develop a robust infrastructure for multi-dose COVID-19 vaccine administration during the pandemic, which has resulted in millions of people across the U.S. receiving the COVID-19 vaccine in easily accessible settings within their communities,” she said.

“It is essential that we expand the infrastructure development ... so that we may use this infrastructure to administer other vaccines such as the hepatitis B vaccine to adults throughout the nation and prevent additional outbreaks.”
 

Implementation of vaccine recommendations key

Dr. Kuwahara outlined key measures that will be important in implementing the hepatitis B vaccine recommendations:

• Awareness of the hepatitis B vaccination recommendations at the primary care level: “The first step in implementing universal [guidelines] will be to ensure that health care providers, particularly in primary care, are aware of the new ACIP guidelines so that they can speak with their patients about this and appropriately order hepatitis B testing and vaccination,” she said.
• Availability of vaccines: In addition to making sure primary care clinics are well stocked with hepatitis B vaccines, the vaccines should also be available in pharmacies and other convenient nonclinical settings through community outreach, similar to COVID-19 vaccines.
• Follow-up: Systems should be established to remind patients to receive follow-up doses.
• Public funding for vaccines: Policy changes will need to occur to allocate appropriate Section 317 funding to provide hepatitis B vaccines to adults without health insurance coverage, Dr. Kuwahara said, underscoring concerns about health equity in vaccination.
• Track vaccinations: Communication should be established between places administering vaccines and primary care providers to make sure that vaccination status can be documented in a reliable setting.

Dr. Kuwahara also noted that a federal immunization information system will be essential to track vaccines across a lifespan, providing one integrated vaccine record that can be accessed even when patients travel or move to different states.

Commenting on the issue, Frank Hood, manager of hepatitis advocacy for The AIDS Institute in Washington, D.C., added that, in addition to simplifying the process, the new age-based recommendation removes the issue of perceived judgement from the advice.

“The previous recommendations were more risk based, and patients may tend to say ‘oh, I don’t have any of those behaviors,’ and there can be some stigma,” he said. “But having something that says everyone in these age groups should be or may be vaccinated just makes it much easier and covers a greater number of individuals.”

Mr. Hood further underscored the need for continued diligence in improving measures to prevent and eradicate HBV as well as other infectious diseases.

“It is imperative that the systems being built now to respond to future infectious disease outbreaks are done so in a way to equitably support the efforts and end goal of eliminating current infectious disease epidemics like viral hepatitis and HIV,” he emphasized.“Elimination can’t be achieved if we leave people behind.”

Dr. Kuwahara and Mr. Hood had no disclosures to report.

A version of this article first appeared on Medscape.com.

An updated recommendation from the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices (ACIP) calling for universal hepatitis B vaccination of all adults aged 59 and younger has boosted the call to improve clinicians’ awareness of the increasing infection and low vaccination rates – and raise the issue with patients.

“This new recommendation from [the] ACIP will be instrumental [in] raising adult hepatitis B vaccination rates in the U.S. to levels that will allow us to finally eliminate hepatitis B in this country,” said Rita K. Kuwahara, MD, a primary care internal medicine physician and health policy fellow at Georgetown University, in Washington, D.C., in addressing the issue at the U.S. Conference on HIV/AIDS (USCHA) this month.

“We have the tools to prevent hepatitis B, and since we have such safe and highly effective vaccines to protect against community [spread], we should not have a single new infection in our nation,” she asserted.

The unanimously approved updated ACIP recommendation was issued in November and still requires adoption by the CDC director. The ACIP specifically recommends that adults aged 19 to 59 and those 60 years and older with risk factors for infection “should” receive the hepatitis B vaccine, and it further stipulates that those 60 years and older without known risk factors for hepatitis B “may” receive the vaccine.

The recommendation was previously only for adults at risk for hepatitis B infection due to a variety of factors, including sexual exposure, percutaneous or mucosal exposure to blood, hepatitis C infection, chronic liver disease, end-stage renal disease, and HIV infection.

“The number of risk factors was long, and for a busy primary care provider to have to go through a lengthy risk-based protocol like that, it may not happen,” Dr. Kuwahara told this news organization.

“Now we have a really helpful new recommendation that is simply age based, and clinicians can just tell patients that if they were born before this certain period, a hepatitis B vaccination is recommended.”

The change comes amid a troubling trajectory of hepatitis B, with up to 2.4 million individuals currently having chronic hepatitis B in the U.S. and infection rates soaring by 100% to more than 400% in states with high opioid use, such as West Virginia, Kentucky, Tennessee, and Maine, Dr. Kuwahara said.

Notably, hepatitis B is the leading cause of liver disease, and one in four individuals with unmanaged chronic hepatitis B goes on to develop liver failure and/or cirrhosis or liver cancer, which has a 5-year survival rate of only 18%.

Despite the rising infection rates, only 25%-30% of adults in the U.S. are reported to be currently vaccinated for hepatitis B, even though safe and highly effective vaccines are available, notably including a new two-dose vaccine (Heplisav-B) that can be provided over just a month (vs. other hepatitis B vaccines requiring 3 doses over 6 months).
 

Clinician awareness of low vaccination rates lacking

Dr. Kuwahara noted that awareness among clinicians of the issues surrounding hepatitis B appears low, with one small survey that she and her colleagues conducted of 30 primary care physicians showing that not one of the respondents was aware of the low vaccination rate.

Dr. Kuwahara says a key reason for the low awareness to discuss the hepatitis B vaccination with adults is the common impression that the responsibility for the vaccination lies in the hands of pediatricians.

But that’s only half correct – universal vaccination for hepatitis B in all infants and children is indeed currently the policy in the U.S. – but that was not implemented in all states until the mid-to-late ‘90s, meaning the millions of adults over the age of about 25 to 30, born before that period, are likely not fully vaccinated against hepatitis B.

“When I was in medical school, there wasn’t a lot of discussion of how low the hepatitis B vaccination rate was because everyone knew there was universal childhood vaccination, and I think there was an assumption that it had been going on for a long time,” Dr. Kuwahara said. “So I think it’s clearly a misconception, and it’s really important to improve clinician awareness around the issue.”
 

Opioid use a key factor in rising infection rates

Importantly, a large proportion of opioid users are among the population of patients born before the mid-’90s – and those adults have a particularly high risk of transmission, with data indicating that 36% of new hepatitis B infections are the result of the opioid epidemic, Dr. Kuwahara noted.

“In the opioid epidemic, we have seen some of the greatest increases in acute hepatitis B presenting in adults aged 30 to 49 years old, as most adults in this age range would not have been vaccinated as children in the U.S.,” she said.

Approximately two-thirds of individuals with chronic hepatitis B are reportedly not even aware of their infection status due to ineffective prevention and vaccination programs, adding to the spread of infection, Dr. Kuwahara said.

Meanwhile, COVID-19 has only exacerbated the problem, with record-high instances of overdoses and overdose-related deaths during the pandemic, she explained.

However, the pandemic, and specifically the sweeping innovations that have been implemented in desperate efforts to bring COVID-19 vaccines to the public, could in fact represent a critical opportunity for hepatitis B prevention, Dr. Kuwahara said.

“Significant resources and federal funding have already been invested to develop a robust infrastructure for multi-dose COVID-19 vaccine administration during the pandemic, which has resulted in millions of people across the U.S. receiving the COVID-19 vaccine in easily accessible settings within their communities,” she said.

“It is essential that we expand the infrastructure development ... so that we may use this infrastructure to administer other vaccines such as the hepatitis B vaccine to adults throughout the nation and prevent additional outbreaks.”
 

Implementation of vaccine recommendations key

Dr. Kuwahara outlined key measures that will be important in implementing the hepatitis B vaccine recommendations:

• Awareness of the hepatitis B vaccination recommendations at the primary care level: “The first step in implementing universal [guidelines] will be to ensure that health care providers, particularly in primary care, are aware of the new ACIP guidelines so that they can speak with their patients about this and appropriately order hepatitis B testing and vaccination,” she said.
• Availability of vaccines: In addition to making sure primary care clinics are well stocked with hepatitis B vaccines, the vaccines should also be available in pharmacies and other convenient nonclinical settings through community outreach, similar to COVID-19 vaccines.
• Follow-up: Systems should be established to remind patients to receive follow-up doses.
• Public funding for vaccines: Policy changes will need to occur to allocate appropriate Section 317 funding to provide hepatitis B vaccines to adults without health insurance coverage, Dr. Kuwahara said, underscoring concerns about health equity in vaccination.
• Track vaccinations: Communication should be established between places administering vaccines and primary care providers to make sure that vaccination status can be documented in a reliable setting.

Dr. Kuwahara also noted that a federal immunization information system will be essential to track vaccines across a lifespan, providing one integrated vaccine record that can be accessed even when patients travel or move to different states.

Commenting on the issue, Frank Hood, manager of hepatitis advocacy for The AIDS Institute in Washington, D.C., added that, in addition to simplifying the process, the new age-based recommendation removes the issue of perceived judgement from the advice.

“The previous recommendations were more risk based, and patients may tend to say ‘oh, I don’t have any of those behaviors,’ and there can be some stigma,” he said. “But having something that says everyone in these age groups should be or may be vaccinated just makes it much easier and covers a greater number of individuals.”

Mr. Hood further underscored the need for continued diligence in improving measures to prevent and eradicate HBV as well as other infectious diseases.

“It is imperative that the systems being built now to respond to future infectious disease outbreaks are done so in a way to equitably support the efforts and end goal of eliminating current infectious disease epidemics like viral hepatitis and HIV,” he emphasized.“Elimination can’t be achieved if we leave people behind.”

Dr. Kuwahara and Mr. Hood had no disclosures to report.

A version of this article first appeared on Medscape.com.

An updated recommendation from the Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices (ACIP) calling for universal hepatitis B vaccination of all adults aged 59 and younger has boosted the call to improve clinicians’ awareness of the increasing infection and low vaccination rates – and raise the issue with patients.

“This new recommendation from [the] ACIP will be instrumental [in] raising adult hepatitis B vaccination rates in the U.S. to levels that will allow us to finally eliminate hepatitis B in this country,” said Rita K. Kuwahara, MD, a primary care internal medicine physician and health policy fellow at Georgetown University, in Washington, D.C., in addressing the issue at the U.S. Conference on HIV/AIDS (USCHA) this month.

“We have the tools to prevent hepatitis B, and since we have such safe and highly effective vaccines to protect against community [spread], we should not have a single new infection in our nation,” she asserted.

The unanimously approved updated ACIP recommendation was issued in November and still requires adoption by the CDC director. The ACIP specifically recommends that adults aged 19 to 59 and those 60 years and older with risk factors for infection “should” receive the hepatitis B vaccine, and it further stipulates that those 60 years and older without known risk factors for hepatitis B “may” receive the vaccine.

The recommendation was previously only for adults at risk for hepatitis B infection due to a variety of factors, including sexual exposure, percutaneous or mucosal exposure to blood, hepatitis C infection, chronic liver disease, end-stage renal disease, and HIV infection.

“The number of risk factors was long, and for a busy primary care provider to have to go through a lengthy risk-based protocol like that, it may not happen,” Dr. Kuwahara told this news organization.

“Now we have a really helpful new recommendation that is simply age based, and clinicians can just tell patients that if they were born before this certain period, a hepatitis B vaccination is recommended.”

The change comes amid a troubling trajectory of hepatitis B, with up to 2.4 million individuals currently having chronic hepatitis B in the U.S. and infection rates soaring by 100% to more than 400% in states with high opioid use, such as West Virginia, Kentucky, Tennessee, and Maine, Dr. Kuwahara said.

Notably, hepatitis B is the leading cause of liver disease, and one in four individuals with unmanaged chronic hepatitis B goes on to develop liver failure and/or cirrhosis or liver cancer, which has a 5-year survival rate of only 18%.

Despite the rising infection rates, only 25%-30% of adults in the U.S. are reported to be currently vaccinated for hepatitis B, even though safe and highly effective vaccines are available, notably including a new two-dose vaccine (Heplisav-B) that can be provided over just a month (vs. other hepatitis B vaccines requiring 3 doses over 6 months).
 

Clinician awareness of low vaccination rates lacking

Dr. Kuwahara noted that awareness among clinicians of the issues surrounding hepatitis B appears low, with one small survey that she and her colleagues conducted of 30 primary care physicians showing that not one of the respondents was aware of the low vaccination rate.

Dr. Kuwahara says a key reason for the low awareness to discuss the hepatitis B vaccination with adults is the common impression that the responsibility for the vaccination lies in the hands of pediatricians.

But that’s only half correct – universal vaccination for hepatitis B in all infants and children is indeed currently the policy in the U.S. – but that was not implemented in all states until the mid-to-late ‘90s, meaning the millions of adults over the age of about 25 to 30, born before that period, are likely not fully vaccinated against hepatitis B.

“When I was in medical school, there wasn’t a lot of discussion of how low the hepatitis B vaccination rate was because everyone knew there was universal childhood vaccination, and I think there was an assumption that it had been going on for a long time,” Dr. Kuwahara said. “So I think it’s clearly a misconception, and it’s really important to improve clinician awareness around the issue.”
 

Opioid use a key factor in rising infection rates

Importantly, a large proportion of opioid users are among the population of patients born before the mid-’90s – and those adults have a particularly high risk of transmission, with data indicating that 36% of new hepatitis B infections are the result of the opioid epidemic, Dr. Kuwahara noted.

“In the opioid epidemic, we have seen some of the greatest increases in acute hepatitis B presenting in adults aged 30 to 49 years old, as most adults in this age range would not have been vaccinated as children in the U.S.,” she said.

Approximately two-thirds of individuals with chronic hepatitis B are reportedly not even aware of their infection status due to ineffective prevention and vaccination programs, adding to the spread of infection, Dr. Kuwahara said.

Meanwhile, COVID-19 has only exacerbated the problem, with record-high instances of overdoses and overdose-related deaths during the pandemic, she explained.

However, the pandemic, and specifically the sweeping innovations that have been implemented in desperate efforts to bring COVID-19 vaccines to the public, could in fact represent a critical opportunity for hepatitis B prevention, Dr. Kuwahara said.

“Significant resources and federal funding have already been invested to develop a robust infrastructure for multi-dose COVID-19 vaccine administration during the pandemic, which has resulted in millions of people across the U.S. receiving the COVID-19 vaccine in easily accessible settings within their communities,” she said.

“It is essential that we expand the infrastructure development ... so that we may use this infrastructure to administer other vaccines such as the hepatitis B vaccine to adults throughout the nation and prevent additional outbreaks.”
 

Implementation of vaccine recommendations key

Dr. Kuwahara outlined key measures that will be important in implementing the hepatitis B vaccine recommendations:

• Awareness of the hepatitis B vaccination recommendations at the primary care level: “The first step in implementing universal [guidelines] will be to ensure that health care providers, particularly in primary care, are aware of the new ACIP guidelines so that they can speak with their patients about this and appropriately order hepatitis B testing and vaccination,” she said.
• Availability of vaccines: In addition to making sure primary care clinics are well stocked with hepatitis B vaccines, the vaccines should also be available in pharmacies and other convenient nonclinical settings through community outreach, similar to COVID-19 vaccines.
• Follow-up: Systems should be established to remind patients to receive follow-up doses.
• Public funding for vaccines: Policy changes will need to occur to allocate appropriate Section 317 funding to provide hepatitis B vaccines to adults without health insurance coverage, Dr. Kuwahara said, underscoring concerns about health equity in vaccination.
• Track vaccinations: Communication should be established between places administering vaccines and primary care providers to make sure that vaccination status can be documented in a reliable setting.

Dr. Kuwahara also noted that a federal immunization information system will be essential to track vaccines across a lifespan, providing one integrated vaccine record that can be accessed even when patients travel or move to different states.

Commenting on the issue, Frank Hood, manager of hepatitis advocacy for The AIDS Institute in Washington, D.C., added that, in addition to simplifying the process, the new age-based recommendation removes the issue of perceived judgement from the advice.

“The previous recommendations were more risk based, and patients may tend to say ‘oh, I don’t have any of those behaviors,’ and there can be some stigma,” he said. “But having something that says everyone in these age groups should be or may be vaccinated just makes it much easier and covers a greater number of individuals.”

Mr. Hood further underscored the need for continued diligence in improving measures to prevent and eradicate HBV as well as other infectious diseases.

“It is imperative that the systems being built now to respond to future infectious disease outbreaks are done so in a way to equitably support the efforts and end goal of eliminating current infectious disease epidemics like viral hepatitis and HIV,” he emphasized.“Elimination can’t be achieved if we leave people behind.”

Dr. Kuwahara and Mr. Hood had no disclosures to report.

A version of this article first appeared on Medscape.com.

The number of reported circulating vaccine-derived poliovirus (cVDPV) outbreaks more than tripled to 29 since Jan. 2017. Most (86%) of these outbreaks were caused by cVDPV2 (circulating VDPV type 2 poliovirus, which originated with the vaccine), and most occurred in Africa, according to a new study of vaccine-derived poliovirus outbreaks between Jan. 2020 and June 2021 published in the CDC’s Morbidity and Mortality Weekly Report.

The Global Polio Eradication Initiative (GPEI) was launched in 1988 and used live attenuated oral poliovirus vaccine (OPV). Since then, cases of wild poliovirus have declined more than 99.99%.

The cVDPV2 likely originated among children born in areas with poor vaccine coverage. Jay Wenger, MD, director, Polio, at the Bill and Melinda Gates Foundation, told this news organization that “the inactivated vaccines that we give in most developed countries now are good in that they provide humoral immunity, the antibodies in the bloodstream. They don’t necessarily provide mucosal immunity. They don’t make the kid’s gut immune to getting reinfected or actually immune to reproducing the virus if they get it in their gut. So we could still have a situation where everybody was vaccinated with IPV [inactivated poliovirus], but the virus could still be transmitting around because kids’ guts would still be producing the virus and there will still be transmission in your population, probably without much or any paralysis because of the IPV. As soon as that virus hit a population that was not vaccinated, they would get paralyzed.”

Dr. Wenger added, “The ideal vaccine would be an oral vaccine that didn’t mutate back and couldn’t cause these VDPVs.” Scientists developed such a vaccine, approved by the World Health Organization last year under an Emergency Use Authorization. This nOPV2 (novel oral poliovirus type 2) vaccine has been given since March 2021 in areas with the VDPD2 outbreaks. The nOPV2 should allow them to “basically stamp out the outbreaks.”

The world had almost eradicated the disease, with the last cases of polio from wild virus occurring in Nigeria, Afghanistan, and Pakistan as of 2014. Africa was declared free of wild polio in 2020 after it had been eradicated from Nigeria, which accounted for more than half of the world’s cases only a decade earlier. Now cVDPV outbreaks affect 28 African countries, plus Iran, Yemen, Afghanistan, Pakistan, Tajikistan, Malaysia, the Philippines, and Indonesia. And there was also one case in China. Globally, there were 1,335 cases of cVDPV causing paralysis during the reporting period.

The COVID-19 pandemic has had a significant impact on polio, accounting for much of this year’s increase in cases. Dr. Wenger said, “We couldn’t do any campaigns. We pretty much stopped doing outbreak response campaigns in the middle of the year because of COVID.”

The CDC report notes that many of the supplementary immunizations in response to cVDPV2 outbreaks were of “poor quality,” and prolonged delays enabled geographically expanding cVDPV2 transmission.

Steve Wassilak, MD, chief coauthor of the CDC study, told this news organization that, because of COVID, “what we’ve been lacking is a rapid response for the most part. Some of that is due to laboratory delays and shipment because of COVID’s effect on international travel.” He noted, however, that there has been good recovery in surveillance and immunization activities despite COVID. And, he added, eradication “can be done, and many outbreaks have closed even during the [COVID] outbreak.”

Dr. Wassilak said that in Nigeria, “the face of the campaign became national.” In Pakistan, much of the work is done by national and international partners.

Dr. Wenger said that in Nigeria and other challenging areas, “the approach was essentially to make direct contact with the traditional leaders and the religious leaders and the local actors in each of these populations. So, it’s really getting down to the grassroots level.” Infectious disease officials send teams to speak with individuals in the “local, traditional leader system.”

“Just talking to them actually got us a long way and giving them the information that they need. In most cases, I mean, people want to do things to help their kids,” said Dr. Wenger.

For now, the initial plan, per the CDC, is to “initiate prompt and high coverage outbreak responses with available type 2 OPV to interrupt transmission” until a better supply of nOPV2 is available, then switch to IPVs.

Dr. Wenger and Dr. Wassilak report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The number of reported circulating vaccine-derived poliovirus (cVDPV) outbreaks more than tripled to 29 since Jan. 2017. Most (86%) of these outbreaks were caused by cVDPV2 (circulating VDPV type 2 poliovirus, which originated with the vaccine), and most occurred in Africa, according to a new study of vaccine-derived poliovirus outbreaks between Jan. 2020 and June 2021 published in the CDC’s Morbidity and Mortality Weekly Report.

The Global Polio Eradication Initiative (GPEI) was launched in 1988 and used live attenuated oral poliovirus vaccine (OPV). Since then, cases of wild poliovirus have declined more than 99.99%.

The cVDPV2 likely originated among children born in areas with poor vaccine coverage. Jay Wenger, MD, director, Polio, at the Bill and Melinda Gates Foundation, told this news organization that “the inactivated vaccines that we give in most developed countries now are good in that they provide humoral immunity, the antibodies in the bloodstream. They don’t necessarily provide mucosal immunity. They don’t make the kid’s gut immune to getting reinfected or actually immune to reproducing the virus if they get it in their gut. So we could still have a situation where everybody was vaccinated with IPV [inactivated poliovirus], but the virus could still be transmitting around because kids’ guts would still be producing the virus and there will still be transmission in your population, probably without much or any paralysis because of the IPV. As soon as that virus hit a population that was not vaccinated, they would get paralyzed.”

Dr. Wenger added, “The ideal vaccine would be an oral vaccine that didn’t mutate back and couldn’t cause these VDPVs.” Scientists developed such a vaccine, approved by the World Health Organization last year under an Emergency Use Authorization. This nOPV2 (novel oral poliovirus type 2) vaccine has been given since March 2021 in areas with the VDPD2 outbreaks. The nOPV2 should allow them to “basically stamp out the outbreaks.”

The world had almost eradicated the disease, with the last cases of polio from wild virus occurring in Nigeria, Afghanistan, and Pakistan as of 2014. Africa was declared free of wild polio in 2020 after it had been eradicated from Nigeria, which accounted for more than half of the world’s cases only a decade earlier. Now cVDPV outbreaks affect 28 African countries, plus Iran, Yemen, Afghanistan, Pakistan, Tajikistan, Malaysia, the Philippines, and Indonesia. And there was also one case in China. Globally, there were 1,335 cases of cVDPV causing paralysis during the reporting period.

The COVID-19 pandemic has had a significant impact on polio, accounting for much of this year’s increase in cases. Dr. Wenger said, “We couldn’t do any campaigns. We pretty much stopped doing outbreak response campaigns in the middle of the year because of COVID.”

The CDC report notes that many of the supplementary immunizations in response to cVDPV2 outbreaks were of “poor quality,” and prolonged delays enabled geographically expanding cVDPV2 transmission.

Steve Wassilak, MD, chief coauthor of the CDC study, told this news organization that, because of COVID, “what we’ve been lacking is a rapid response for the most part. Some of that is due to laboratory delays and shipment because of COVID’s effect on international travel.” He noted, however, that there has been good recovery in surveillance and immunization activities despite COVID. And, he added, eradication “can be done, and many outbreaks have closed even during the [COVID] outbreak.”

Dr. Wassilak said that in Nigeria, “the face of the campaign became national.” In Pakistan, much of the work is done by national and international partners.

Dr. Wenger said that in Nigeria and other challenging areas, “the approach was essentially to make direct contact with the traditional leaders and the religious leaders and the local actors in each of these populations. So, it’s really getting down to the grassroots level.” Infectious disease officials send teams to speak with individuals in the “local, traditional leader system.”

“Just talking to them actually got us a long way and giving them the information that they need. In most cases, I mean, people want to do things to help their kids,” said Dr. Wenger.

For now, the initial plan, per the CDC, is to “initiate prompt and high coverage outbreak responses with available type 2 OPV to interrupt transmission” until a better supply of nOPV2 is available, then switch to IPVs.

Dr. Wenger and Dr. Wassilak report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The number of reported circulating vaccine-derived poliovirus (cVDPV) outbreaks more than tripled to 29 since Jan. 2017. Most (86%) of these outbreaks were caused by cVDPV2 (circulating VDPV type 2 poliovirus, which originated with the vaccine), and most occurred in Africa, according to a new study of vaccine-derived poliovirus outbreaks between Jan. 2020 and June 2021 published in the CDC’s Morbidity and Mortality Weekly Report.

The Global Polio Eradication Initiative (GPEI) was launched in 1988 and used live attenuated oral poliovirus vaccine (OPV). Since then, cases of wild poliovirus have declined more than 99.99%.

The cVDPV2 likely originated among children born in areas with poor vaccine coverage. Jay Wenger, MD, director, Polio, at the Bill and Melinda Gates Foundation, told this news organization that “the inactivated vaccines that we give in most developed countries now are good in that they provide humoral immunity, the antibodies in the bloodstream. They don’t necessarily provide mucosal immunity. They don’t make the kid’s gut immune to getting reinfected or actually immune to reproducing the virus if they get it in their gut. So we could still have a situation where everybody was vaccinated with IPV [inactivated poliovirus], but the virus could still be transmitting around because kids’ guts would still be producing the virus and there will still be transmission in your population, probably without much or any paralysis because of the IPV. As soon as that virus hit a population that was not vaccinated, they would get paralyzed.”

Dr. Wenger added, “The ideal vaccine would be an oral vaccine that didn’t mutate back and couldn’t cause these VDPVs.” Scientists developed such a vaccine, approved by the World Health Organization last year under an Emergency Use Authorization. This nOPV2 (novel oral poliovirus type 2) vaccine has been given since March 2021 in areas with the VDPD2 outbreaks. The nOPV2 should allow them to “basically stamp out the outbreaks.”

The world had almost eradicated the disease, with the last cases of polio from wild virus occurring in Nigeria, Afghanistan, and Pakistan as of 2014. Africa was declared free of wild polio in 2020 after it had been eradicated from Nigeria, which accounted for more than half of the world’s cases only a decade earlier. Now cVDPV outbreaks affect 28 African countries, plus Iran, Yemen, Afghanistan, Pakistan, Tajikistan, Malaysia, the Philippines, and Indonesia. And there was also one case in China. Globally, there were 1,335 cases of cVDPV causing paralysis during the reporting period.

The COVID-19 pandemic has had a significant impact on polio, accounting for much of this year’s increase in cases. Dr. Wenger said, “We couldn’t do any campaigns. We pretty much stopped doing outbreak response campaigns in the middle of the year because of COVID.”

The CDC report notes that many of the supplementary immunizations in response to cVDPV2 outbreaks were of “poor quality,” and prolonged delays enabled geographically expanding cVDPV2 transmission.

Steve Wassilak, MD, chief coauthor of the CDC study, told this news organization that, because of COVID, “what we’ve been lacking is a rapid response for the most part. Some of that is due to laboratory delays and shipment because of COVID’s effect on international travel.” He noted, however, that there has been good recovery in surveillance and immunization activities despite COVID. And, he added, eradication “can be done, and many outbreaks have closed even during the [COVID] outbreak.”

Dr. Wassilak said that in Nigeria, “the face of the campaign became national.” In Pakistan, much of the work is done by national and international partners.

Dr. Wenger said that in Nigeria and other challenging areas, “the approach was essentially to make direct contact with the traditional leaders and the religious leaders and the local actors in each of these populations. So, it’s really getting down to the grassroots level.” Infectious disease officials send teams to speak with individuals in the “local, traditional leader system.”

“Just talking to them actually got us a long way and giving them the information that they need. In most cases, I mean, people want to do things to help their kids,” said Dr. Wenger.

For now, the initial plan, per the CDC, is to “initiate prompt and high coverage outbreak responses with available type 2 OPV to interrupt transmission” until a better supply of nOPV2 is available, then switch to IPVs.

Dr. Wenger and Dr. Wassilak report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

A panel of experts that advises the Centers for Disease Control and Prevention on the use of vaccines said the Pfizer and Moderna mRNA COVID-19 vaccines should be the preferred shots for adults in the United States because the Johnson & Johnson shot carries the risk of a rare but potentially fatal side effect that causes blood clots and bleeding in the brain.

In an emergency meeting on December 16, the CDC’s Advisory Committee on Immunization Practices, or ACIP, voted unanimously (15-0) to state a preference for the mRNA vaccines over the Johnson & Johnson shot. The vote came after the panel heard a safety update on cases of thrombosis with thrombocytopenia syndrome, or TTS, a condition that causes large clots that deplete the blood of platelets, resulting in uncontrolled bleeding.

The move brings the United States in line with other wealthy countries. In May, Denmark dropped the Johnson & Johnson shot from its vaccination program because of this risk. Australia and Greece have limited the use of a similar vaccine, made by AstraZeneca, in younger people because of the TTS risk. Both vaccines use the envelope of a different kind of virus, called an adenovirus, to sneak the vaccine instructions into cells. On Dec. 16, health officials said they had determined that TTS was likely due to a class effect, meaning it happens with all adenovirus vector vaccines.

The risk of dying from TTS after a Johnson & Johnson shot is extremely rare. There is an estimated 1 death for every 2 million doses of the vaccine given in the general population. That risk is higher for women ages 30 to 49, rising to about 2 deaths for every 1 million doses given in this age group. There’s no question that the Johnson & Johnson shot has saved many more lives than it has taken, experts said

Still, the committee previously paused the use of the Johnson & Johnson vaccine in April after the first cases of TTS came to light. That pause was lifted just 10 days later, after a new warning was added to the vaccine’s label to raise awareness of the risk.

In updating the safety information on Johnson & Johnson, the panel noted that the warning label had not sufficiently lowered the risk of death from TTS. Doctors seem to be aware of the condition because none of the patients who had developed TTS had been treated with the blood thinner heparin, which can make the syndrome worse. But patients continued to die even after the label was added, the panel noted, because TTS can progress so quickly that doctors simply don’t have time to treat it.

For that reason, and because there are other, safer vaccines available, the panel decided to make what’s called a preferential statement, saying the Pfizer and Moderna mRNA vaccines should be preferred over Johnson & Johnson.

The statement leaves the J&J vaccine on the market and available to patients who are at risk of a severe allergic reaction to the mRNA vaccines. It also means that people can still choose the J&J vaccine if they still want it after being informed about the risks.

About 17 million first doses and 900,000 second doses of the Johnson & Johnson vaccine have been given in the United States. Through the end of August, 54 cases of thrombosis with thrombocytopenia syndrome (TTS) have occurred after the J&J shots in the United States. Nearly half of those were in women ages 30 to 49. There have been nine deaths from TTS after Johnson & Johnson shots.

A version of this article first appeared on WebMD.com.

A panel of experts that advises the Centers for Disease Control and Prevention on the use of vaccines said the Pfizer and Moderna mRNA COVID-19 vaccines should be the preferred shots for adults in the United States because the Johnson & Johnson shot carries the risk of a rare but potentially fatal side effect that causes blood clots and bleeding in the brain.

In an emergency meeting on December 16, the CDC’s Advisory Committee on Immunization Practices, or ACIP, voted unanimously (15-0) to state a preference for the mRNA vaccines over the Johnson & Johnson shot. The vote came after the panel heard a safety update on cases of thrombosis with thrombocytopenia syndrome, or TTS, a condition that causes large clots that deplete the blood of platelets, resulting in uncontrolled bleeding.

The move brings the United States in line with other wealthy countries. In May, Denmark dropped the Johnson & Johnson shot from its vaccination program because of this risk. Australia and Greece have limited the use of a similar vaccine, made by AstraZeneca, in younger people because of the TTS risk. Both vaccines use the envelope of a different kind of virus, called an adenovirus, to sneak the vaccine instructions into cells. On Dec. 16, health officials said they had determined that TTS was likely due to a class effect, meaning it happens with all adenovirus vector vaccines.

The risk of dying from TTS after a Johnson & Johnson shot is extremely rare. There is an estimated 1 death for every 2 million doses of the vaccine given in the general population. That risk is higher for women ages 30 to 49, rising to about 2 deaths for every 1 million doses given in this age group. There’s no question that the Johnson & Johnson shot has saved many more lives than it has taken, experts said

Still, the committee previously paused the use of the Johnson & Johnson vaccine in April after the first cases of TTS came to light. That pause was lifted just 10 days later, after a new warning was added to the vaccine’s label to raise awareness of the risk.

In updating the safety information on Johnson & Johnson, the panel noted that the warning label had not sufficiently lowered the risk of death from TTS. Doctors seem to be aware of the condition because none of the patients who had developed TTS had been treated with the blood thinner heparin, which can make the syndrome worse. But patients continued to die even after the label was added, the panel noted, because TTS can progress so quickly that doctors simply don’t have time to treat it.

For that reason, and because there are other, safer vaccines available, the panel decided to make what’s called a preferential statement, saying the Pfizer and Moderna mRNA vaccines should be preferred over Johnson & Johnson.

The statement leaves the J&J vaccine on the market and available to patients who are at risk of a severe allergic reaction to the mRNA vaccines. It also means that people can still choose the J&J vaccine if they still want it after being informed about the risks.

About 17 million first doses and 900,000 second doses of the Johnson & Johnson vaccine have been given in the United States. Through the end of August, 54 cases of thrombosis with thrombocytopenia syndrome (TTS) have occurred after the J&J shots in the United States. Nearly half of those were in women ages 30 to 49. There have been nine deaths from TTS after Johnson & Johnson shots.

A version of this article first appeared on WebMD.com.

A panel of experts that advises the Centers for Disease Control and Prevention on the use of vaccines said the Pfizer and Moderna mRNA COVID-19 vaccines should be the preferred shots for adults in the United States because the Johnson & Johnson shot carries the risk of a rare but potentially fatal side effect that causes blood clots and bleeding in the brain.

In an emergency meeting on December 16, the CDC’s Advisory Committee on Immunization Practices, or ACIP, voted unanimously (15-0) to state a preference for the mRNA vaccines over the Johnson & Johnson shot. The vote came after the panel heard a safety update on cases of thrombosis with thrombocytopenia syndrome, or TTS, a condition that causes large clots that deplete the blood of platelets, resulting in uncontrolled bleeding.

The move brings the United States in line with other wealthy countries. In May, Denmark dropped the Johnson & Johnson shot from its vaccination program because of this risk. Australia and Greece have limited the use of a similar vaccine, made by AstraZeneca, in younger people because of the TTS risk. Both vaccines use the envelope of a different kind of virus, called an adenovirus, to sneak the vaccine instructions into cells. On Dec. 16, health officials said they had determined that TTS was likely due to a class effect, meaning it happens with all adenovirus vector vaccines.

The risk of dying from TTS after a Johnson & Johnson shot is extremely rare. There is an estimated 1 death for every 2 million doses of the vaccine given in the general population. That risk is higher for women ages 30 to 49, rising to about 2 deaths for every 1 million doses given in this age group. There’s no question that the Johnson & Johnson shot has saved many more lives than it has taken, experts said

Still, the committee previously paused the use of the Johnson & Johnson vaccine in April after the first cases of TTS came to light. That pause was lifted just 10 days later, after a new warning was added to the vaccine’s label to raise awareness of the risk.

In updating the safety information on Johnson & Johnson, the panel noted that the warning label had not sufficiently lowered the risk of death from TTS. Doctors seem to be aware of the condition because none of the patients who had developed TTS had been treated with the blood thinner heparin, which can make the syndrome worse. But patients continued to die even after the label was added, the panel noted, because TTS can progress so quickly that doctors simply don’t have time to treat it.

For that reason, and because there are other, safer vaccines available, the panel decided to make what’s called a preferential statement, saying the Pfizer and Moderna mRNA vaccines should be preferred over Johnson & Johnson.

The statement leaves the J&J vaccine on the market and available to patients who are at risk of a severe allergic reaction to the mRNA vaccines. It also means that people can still choose the J&J vaccine if they still want it after being informed about the risks.

About 17 million first doses and 900,000 second doses of the Johnson & Johnson vaccine have been given in the United States. Through the end of August, 54 cases of thrombosis with thrombocytopenia syndrome (TTS) have occurred after the J&J shots in the United States. Nearly half of those were in women ages 30 to 49. There have been nine deaths from TTS after Johnson & Johnson shots.

A version of this article first appeared on WebMD.com.

In recent weeks, the Centers for Disease Control and Prevention has greatly expanded recommendations for boosters for vaccinations against COVID-19.

These recommendations have been widened because of the continued emergence of new variants of the virus and the wane of protection over time for both vaccinations and previous disease.

The new recommendations take away some of the questions surrounding eligibility for booster vaccinations while potentially leaving some additional questions. All in all, they provide flexibility for individuals to help protect themselves against the COVID-19 virus, as many are considering celebrating the holidays with friends and family.

The first item that has become clear is that all individuals over 18 are now not only eligible for a booster vaccination a certain time after they have completed their series, but have a recommendation for one.¹

But what about a fourth dose?  There is a possibility that some patients should be receiving one.  For those who require a three-dose series due to a condition that makes them immunocompromised, they should receive their booster vaccination six months after completion of the three-dose series.  This distinction  may cause confusion for some, but is important for those immunocompromised.

Boosters in women who are pregnant

The recommendations also include specific comments about individuals who are pregnant. Although initial studies did not include pregnant individuals, there has been increasing real world data that vaccination against COVID, including booster vaccinations, is safe and recommended. As pregnancy increases the risk of severe disease if infected by COVID-19, both the CDC and the American College of Obstetricians and Gynecologists,² along with other specialty organizations, such as the Royal College of Obstetricians and Gynaecologists, recommend vaccinations for pregnant individuals.

The CDC goes on to describe that there is no evidence of vaccination increasing the risk of infertility. The vaccine protects the pregnant individual and also provides protection to the baby once born. The same is true of breastfeeding individuals.³

I hope that this information allows physicians to feel comfortable recommending vaccinations and boosters to those who are pregnant and breast feeding.
 

Expanded recommendations for those aged 16-17 years

Recently, the CDC also expanded booster recommendations to include those aged 16-17 years, 6 months after completing their vaccine series.

Those under 18 are currently only able to receive the Pfizer-BioNtech vaccine. This new guidance has left some parents wondering if there will also be approval for booster vaccinations soon for those aged 12-16 who are approaching or have reached six months past the initial vaccine.¹

Booster brand for those over 18 years?

Although the recommendation has been simplified for all over age 18 years, there is still a decision to be made about which vaccine to use as the booster.

The recommendations allow individuals to decide which brand of vaccine they would like to have as a booster. They may choose to be vaccinated with the same vaccine they originally received or with a different vaccine. This vaccine flexibility may cause confusion, but ultimately is a good thing as it allows individuals to receive whatever vaccine is available and most convenient. This also allows individuals who have been vaccinated outside of the United States by a different brand of vaccine to also receive a booster vaccination with one of the options available here.
 

Take home message

Overall, the expansion of booster recommendations will help everyone avoid severe disease from COVID-19 infections. Physicians now have more clarity on who should be receiving these vaccines. Along with testing, masking, and appropriate distancing, these recommendations should help prevent severe disease and death from COVID-19.

Dr. Wheat is a family physician at Erie Family Health Center in Chicago. She is program director of Northwestern’s McGaw Family Medicine residency program, also in Chicago. Dr. Wheat serves on the editorial advisory board of Family Practice News. You can contact her at fpnews@mdedge.com.

References

1. COVID-19 Vaccine Booster Shots. Centers for Disease Control and Prevention. 2021 Dec 9.

2. COVID-19 Vaccines and Pregnancy: Conversation Guide. American College of Obstetricians and Gynecologists. 2021 November.

3. COVID-19 Vaccines While Pregnant or Breastfeeding. Centers for Disease Control and Prevention. 2021 Dec 6.

In recent weeks, the Centers for Disease Control and Prevention has greatly expanded recommendations for boosters for vaccinations against COVID-19.

These recommendations have been widened because of the continued emergence of new variants of the virus and the wane of protection over time for both vaccinations and previous disease.

The new recommendations take away some of the questions surrounding eligibility for booster vaccinations while potentially leaving some additional questions. All in all, they provide flexibility for individuals to help protect themselves against the COVID-19 virus, as many are considering celebrating the holidays with friends and family.

The first item that has become clear is that all individuals over 18 are now not only eligible for a booster vaccination a certain time after they have completed their series, but have a recommendation for one.¹

But what about a fourth dose?  There is a possibility that some patients should be receiving one.  For those who require a three-dose series due to a condition that makes them immunocompromised, they should receive their booster vaccination six months after completion of the three-dose series.  This distinction  may cause confusion for some, but is important for those immunocompromised.

Boosters in women who are pregnant

The recommendations also include specific comments about individuals who are pregnant. Although initial studies did not include pregnant individuals, there has been increasing real world data that vaccination against COVID, including booster vaccinations, is safe and recommended. As pregnancy increases the risk of severe disease if infected by COVID-19, both the CDC and the American College of Obstetricians and Gynecologists,² along with other specialty organizations, such as the Royal College of Obstetricians and Gynaecologists, recommend vaccinations for pregnant individuals.

The CDC goes on to describe that there is no evidence of vaccination increasing the risk of infertility. The vaccine protects the pregnant individual and also provides protection to the baby once born. The same is true of breastfeeding individuals.³

I hope that this information allows physicians to feel comfortable recommending vaccinations and boosters to those who are pregnant and breast feeding.
 

Expanded recommendations for those aged 16-17 years

Recently, the CDC also expanded booster recommendations to include those aged 16-17 years, 6 months after completing their vaccine series.

Those under 18 are currently only able to receive the Pfizer-BioNtech vaccine. This new guidance has left some parents wondering if there will also be approval for booster vaccinations soon for those aged 12-16 who are approaching or have reached six months past the initial vaccine.¹

Booster brand for those over 18 years?

Although the recommendation has been simplified for all over age 18 years, there is still a decision to be made about which vaccine to use as the booster.

The recommendations allow individuals to decide which brand of vaccine they would like to have as a booster. They may choose to be vaccinated with the same vaccine they originally received or with a different vaccine. This vaccine flexibility may cause confusion, but ultimately is a good thing as it allows individuals to receive whatever vaccine is available and most convenient. This also allows individuals who have been vaccinated outside of the United States by a different brand of vaccine to also receive a booster vaccination with one of the options available here.
 

Take home message

Overall, the expansion of booster recommendations will help everyone avoid severe disease from COVID-19 infections. Physicians now have more clarity on who should be receiving these vaccines. Along with testing, masking, and appropriate distancing, these recommendations should help prevent severe disease and death from COVID-19.

Dr. Wheat is a family physician at Erie Family Health Center in Chicago. She is program director of Northwestern’s McGaw Family Medicine residency program, also in Chicago. Dr. Wheat serves on the editorial advisory board of Family Practice News. You can contact her at fpnews@mdedge.com.

References

1. COVID-19 Vaccine Booster Shots. Centers for Disease Control and Prevention. 2021 Dec 9.

2. COVID-19 Vaccines and Pregnancy: Conversation Guide. American College of Obstetricians and Gynecologists. 2021 November.

3. COVID-19 Vaccines While Pregnant or Breastfeeding. Centers for Disease Control and Prevention. 2021 Dec 6.

In recent weeks, the Centers for Disease Control and Prevention has greatly expanded recommendations for boosters for vaccinations against COVID-19.

These recommendations have been widened because of the continued emergence of new variants of the virus and the wane of protection over time for both vaccinations and previous disease.

The new recommendations take away some of the questions surrounding eligibility for booster vaccinations while potentially leaving some additional questions. All in all, they provide flexibility for individuals to help protect themselves against the COVID-19 virus, as many are considering celebrating the holidays with friends and family.

The first item that has become clear is that all individuals over 18 are now not only eligible for a booster vaccination a certain time after they have completed their series, but have a recommendation for one.¹

But what about a fourth dose?  There is a possibility that some patients should be receiving one.  For those who require a three-dose series due to a condition that makes them immunocompromised, they should receive their booster vaccination six months after completion of the three-dose series.  This distinction  may cause confusion for some, but is important for those immunocompromised.

Boosters in women who are pregnant

The recommendations also include specific comments about individuals who are pregnant. Although initial studies did not include pregnant individuals, there has been increasing real world data that vaccination against COVID, including booster vaccinations, is safe and recommended. As pregnancy increases the risk of severe disease if infected by COVID-19, both the CDC and the American College of Obstetricians and Gynecologists,² along with other specialty organizations, such as the Royal College of Obstetricians and Gynaecologists, recommend vaccinations for pregnant individuals.

The CDC goes on to describe that there is no evidence of vaccination increasing the risk of infertility. The vaccine protects the pregnant individual and also provides protection to the baby once born. The same is true of breastfeeding individuals.³

I hope that this information allows physicians to feel comfortable recommending vaccinations and boosters to those who are pregnant and breast feeding.
 

Expanded recommendations for those aged 16-17 years

Recently, the CDC also expanded booster recommendations to include those aged 16-17 years, 6 months after completing their vaccine series.

Those under 18 are currently only able to receive the Pfizer-BioNtech vaccine. This new guidance has left some parents wondering if there will also be approval for booster vaccinations soon for those aged 12-16 who are approaching or have reached six months past the initial vaccine.¹

Booster brand for those over 18 years?

Although the recommendation has been simplified for all over age 18 years, there is still a decision to be made about which vaccine to use as the booster.

The recommendations allow individuals to decide which brand of vaccine they would like to have as a booster. They may choose to be vaccinated with the same vaccine they originally received or with a different vaccine. This vaccine flexibility may cause confusion, but ultimately is a good thing as it allows individuals to receive whatever vaccine is available and most convenient. This also allows individuals who have been vaccinated outside of the United States by a different brand of vaccine to also receive a booster vaccination with one of the options available here.
 

Take home message

Overall, the expansion of booster recommendations will help everyone avoid severe disease from COVID-19 infections. Physicians now have more clarity on who should be receiving these vaccines. Along with testing, masking, and appropriate distancing, these recommendations should help prevent severe disease and death from COVID-19.

Dr. Wheat is a family physician at Erie Family Health Center in Chicago. She is program director of Northwestern’s McGaw Family Medicine residency program, also in Chicago. Dr. Wheat serves on the editorial advisory board of Family Practice News. You can contact her at fpnews@mdedge.com.

References

1. COVID-19 Vaccine Booster Shots. Centers for Disease Control and Prevention. 2021 Dec 9.

2. COVID-19 Vaccines and Pregnancy: Conversation Guide. American College of Obstetricians and Gynecologists. 2021 November.

3. COVID-19 Vaccines While Pregnant or Breastfeeding. Centers for Disease Control and Prevention. 2021 Dec 6.

The Food and Drug Administration has authorized booster doses of Pfizer’s COVID-19 vaccine, clearing the way for millions of teenagers to get a third dose of vaccine starting 6 months after their second dose.

The FDA said it was basing its emergency authorization of boosters for 16- and 17-year-olds on data from 200 individuals who were 18-55 years of age when they received a booster dose. They are requiring Pfizer to collect data on safety in postauthorization studies.

“The FDA has determined that the benefits of a single booster dose of the Pfizer-BioNTech COVID-19 Vaccine or Comirnaty outweigh the risks of myocarditis and pericarditis in individuals 16 and 17 years of age to provide continued protection against COVID-19 and the associated serious consequences that can occur including hospitalization and death,” the agency said in a news release.

Israel has been giving booster doses of Pfizer’s vaccine to everyone 12 and up since late August. Data from that country show that myocarditis cases continue to be very rare, even in younger age groups, and are mild and temporary.

The authorization comes as the effectiveness of the current vaccines against the new Omicron variant has become a point of intense scientific inquiry.

Early studies suggest that booster doses may be necessary to keep Omicron at bay, at least until new variant-specific vaccines are ready next spring.

Current evidence suggests that the protection of the vaccines is holding up well against severe disease and death, at least with Delta and early iterations of the virus.

How well they will do against Omicron, and how severe Omicron infections may be for different age groups, remain open questions.

On Dec. 8, the World Health Organization urged countries not to wait for all the science to come in, but to act now to contain any potential threat.

The first pieces of evidence on Omicron suggest that it is highly contagious, perhaps even more than Delta, though early reports suggest symptoms caused by this version of the new coronavirus may be less severe than in previous waves. Experts have cautioned that the true severity of Omicron infections isn’t yet known, since the first cases have been detected in younger people, who tend to have milder COVID-19 symptoms than those of adults and seniors.

“Vaccination and getting a booster when eligible, along with other preventive measures like masking and avoiding large crowds and poorly ventilated spaces, remain our most effective methods for fighting COVID-19,” Acting FDA Commissioner Janet Woodcock, MD, said in a news release. “As people gather indoors with family and friends for the holidays, we can’t let up on all the preventive public health measures that we have been taking during the pandemic. With both the Delta and Omicron variants continuing to spread, vaccination remains the best protection against COVID-19.”

In mid-November, the FDA authorized boosters of the Pfizer vaccine for all individuals 18 and older, but the agency held off on expanding the use of boosters for younger age groups, partly because they have the highest risk of myocarditis, a very rare side effect.

Myocarditis cases seem to be temporary, with patients making a full recovery, though they need to be monitored in the hospital. The risk of myocarditis with a COVID-19 infection is many times higher than it is from a vaccine.

There have been little data to support the need for boosters in this age group, because children and teens tend to experience milder COVID-19 disease, though they are still at risk for post–COVID-19 complications such as long COVID and a delayed reaction to the virus called Post Acute Sequelae of SARS-CoV2 Infection among Children, or PAS-C.

All that changed with the arrival of Omicron.

A version of this article first appeared on WebMD.com.

The Food and Drug Administration has authorized booster doses of Pfizer’s COVID-19 vaccine, clearing the way for millions of teenagers to get a third dose of vaccine starting 6 months after their second dose.

The FDA said it was basing its emergency authorization of boosters for 16- and 17-year-olds on data from 200 individuals who were 18-55 years of age when they received a booster dose. They are requiring Pfizer to collect data on safety in postauthorization studies.

“The FDA has determined that the benefits of a single booster dose of the Pfizer-BioNTech COVID-19 Vaccine or Comirnaty outweigh the risks of myocarditis and pericarditis in individuals 16 and 17 years of age to provide continued protection against COVID-19 and the associated serious consequences that can occur including hospitalization and death,” the agency said in a news release.

Israel has been giving booster doses of Pfizer’s vaccine to everyone 12 and up since late August. Data from that country show that myocarditis cases continue to be very rare, even in younger age groups, and are mild and temporary.

The authorization comes as the effectiveness of the current vaccines against the new Omicron variant has become a point of intense scientific inquiry.

Early studies suggest that booster doses may be necessary to keep Omicron at bay, at least until new variant-specific vaccines are ready next spring.

Current evidence suggests that the protection of the vaccines is holding up well against severe disease and death, at least with Delta and early iterations of the virus.

How well they will do against Omicron, and how severe Omicron infections may be for different age groups, remain open questions.

On Dec. 8, the World Health Organization urged countries not to wait for all the science to come in, but to act now to contain any potential threat.

The first pieces of evidence on Omicron suggest that it is highly contagious, perhaps even more than Delta, though early reports suggest symptoms caused by this version of the new coronavirus may be less severe than in previous waves. Experts have cautioned that the true severity of Omicron infections isn’t yet known, since the first cases have been detected in younger people, who tend to have milder COVID-19 symptoms than those of adults and seniors.

“Vaccination and getting a booster when eligible, along with other preventive measures like masking and avoiding large crowds and poorly ventilated spaces, remain our most effective methods for fighting COVID-19,” Acting FDA Commissioner Janet Woodcock, MD, said in a news release. “As people gather indoors with family and friends for the holidays, we can’t let up on all the preventive public health measures that we have been taking during the pandemic. With both the Delta and Omicron variants continuing to spread, vaccination remains the best protection against COVID-19.”

In mid-November, the FDA authorized boosters of the Pfizer vaccine for all individuals 18 and older, but the agency held off on expanding the use of boosters for younger age groups, partly because they have the highest risk of myocarditis, a very rare side effect.

Myocarditis cases seem to be temporary, with patients making a full recovery, though they need to be monitored in the hospital. The risk of myocarditis with a COVID-19 infection is many times higher than it is from a vaccine.

There have been little data to support the need for boosters in this age group, because children and teens tend to experience milder COVID-19 disease, though they are still at risk for post–COVID-19 complications such as long COVID and a delayed reaction to the virus called Post Acute Sequelae of SARS-CoV2 Infection among Children, or PAS-C.

All that changed with the arrival of Omicron.

A version of this article first appeared on WebMD.com.

The Food and Drug Administration has authorized booster doses of Pfizer’s COVID-19 vaccine, clearing the way for millions of teenagers to get a third dose of vaccine starting 6 months after their second dose.

The FDA said it was basing its emergency authorization of boosters for 16- and 17-year-olds on data from 200 individuals who were 18-55 years of age when they received a booster dose. They are requiring Pfizer to collect data on safety in postauthorization studies.

“The FDA has determined that the benefits of a single booster dose of the Pfizer-BioNTech COVID-19 Vaccine or Comirnaty outweigh the risks of myocarditis and pericarditis in individuals 16 and 17 years of age to provide continued protection against COVID-19 and the associated serious consequences that can occur including hospitalization and death,” the agency said in a news release.

Israel has been giving booster doses of Pfizer’s vaccine to everyone 12 and up since late August. Data from that country show that myocarditis cases continue to be very rare, even in younger age groups, and are mild and temporary.

The authorization comes as the effectiveness of the current vaccines against the new Omicron variant has become a point of intense scientific inquiry.

Early studies suggest that booster doses may be necessary to keep Omicron at bay, at least until new variant-specific vaccines are ready next spring.

Current evidence suggests that the protection of the vaccines is holding up well against severe disease and death, at least with Delta and early iterations of the virus.

How well they will do against Omicron, and how severe Omicron infections may be for different age groups, remain open questions.

On Dec. 8, the World Health Organization urged countries not to wait for all the science to come in, but to act now to contain any potential threat.

The first pieces of evidence on Omicron suggest that it is highly contagious, perhaps even more than Delta, though early reports suggest symptoms caused by this version of the new coronavirus may be less severe than in previous waves. Experts have cautioned that the true severity of Omicron infections isn’t yet known, since the first cases have been detected in younger people, who tend to have milder COVID-19 symptoms than those of adults and seniors.

“Vaccination and getting a booster when eligible, along with other preventive measures like masking and avoiding large crowds and poorly ventilated spaces, remain our most effective methods for fighting COVID-19,” Acting FDA Commissioner Janet Woodcock, MD, said in a news release. “As people gather indoors with family and friends for the holidays, we can’t let up on all the preventive public health measures that we have been taking during the pandemic. With both the Delta and Omicron variants continuing to spread, vaccination remains the best protection against COVID-19.”

In mid-November, the FDA authorized boosters of the Pfizer vaccine for all individuals 18 and older, but the agency held off on expanding the use of boosters for younger age groups, partly because they have the highest risk of myocarditis, a very rare side effect.

Myocarditis cases seem to be temporary, with patients making a full recovery, though they need to be monitored in the hospital. The risk of myocarditis with a COVID-19 infection is many times higher than it is from a vaccine.

There have been little data to support the need for boosters in this age group, because children and teens tend to experience milder COVID-19 disease, though they are still at risk for post–COVID-19 complications such as long COVID and a delayed reaction to the virus called Post Acute Sequelae of SARS-CoV2 Infection among Children, or PAS-C.

All that changed with the arrival of Omicron.

A version of this article first appeared on WebMD.com.

The Pfizer/BioNTech booster lowers the risk for confirmed illness, severe illness, and death from COVID-19, according to two large studies from Israel published Dec. 8, 2021, in the New England Journal of Medicine.

Both studies were completed before the advent of the Omicron variant.

In one study that included data on more than 4 million patients, led by Yinon M. Bar-On, MSc, of the Weizmann Institute of Science in Rehovot, Israel, the rate of confirmed SARS-CoV-2 infection was lower in the booster group than in the nonbooster group by a factor of about 10.

This was true across all five age groups studied (range among the groups [starting with age 16], 9.0-17.2).

The risk for severe COVID-19 in the primary analysis decreased in the booster group by a factor of 17.9 (95% confidence interval, 15.1-21.2), among those aged 60 years or older. Risk for severe illness in those ages 40-59 was lower by a factor of 21.7 (95% CI, 10.6-44.2).

Among the 60 and older age group, risk for death was also reduced by a factor of 14.7 (95% CI, 10.0-21.4).

Researchers analyzed data for the period from July 30 to Oct. 10, 2021, from the Israel Ministry of Health database on 4.69 million people at least 16 years old who had received two Pfizer doses at least 5 months earlier.

In the main analysis, the researchers compared the rates of confirmed COVID-19, severe disease, and death among those who had gotten a booster at least 12 days earlier with the rates in a nonbooster group.

The authors wrote: “Booster vaccination programs may provide a way to control transmission without costly social-distancing measures and quarantines. Our findings provide evidence for the short-term effectiveness of the booster dose against the currently dominant Delta variant in persons 16 years of age or older.”
 

Death risk down by 90%

A second study, led by Ronen Arbel, PhD, with the community medical services division, Clalit Health Services (CHS), Tel Aviv, which included more than 800,000 participants, also found mortality risk was greatly reduced among those who received the booster compared with those who didn’t get the booster.

Participants aged 50 years or older who received a booster at least 5 months after a second Pfizer dose had 90% lower mortality risk because of COVID-19 than participants who did not get the booster.

The adjusted hazard ratio for death as a result of COVID-19 in the booster group, as compared with the nonbooster group, was 0.10 (95% CI, 0.07-0.14; P < .001). Of the 843,208 eligible participants, 758,118 (90%) received the booster during the 54-day study period.

The study included all CHS members who were aged 50 years or older on the study start date and had received two Pfizer doses at least 5 months earlier. CHS covers about 52% of the Israeli population and is the largest of four health care organizations in Israel that provide mandatory health care.

The authors noted that, although the study period was only 54 days (Aug. 6–Sept. 29), during that time “the incidence of COVID-19 in Israel was one of the highest in the world.”

The authors of both original articles pointed out that the studies are limited by short time periods and that longer-term studies are needed to see how the booster shots stand up to known and future variants, such as Omicron.

None of the authors involved in both studies reported relevant financial relationships.

A version of this article first appeared on Medscape.com.

The Pfizer/BioNTech booster lowers the risk for confirmed illness, severe illness, and death from COVID-19, according to two large studies from Israel published Dec. 8, 2021, in the New England Journal of Medicine.

Both studies were completed before the advent of the Omicron variant.

In one study that included data on more than 4 million patients, led by Yinon M. Bar-On, MSc, of the Weizmann Institute of Science in Rehovot, Israel, the rate of confirmed SARS-CoV-2 infection was lower in the booster group than in the nonbooster group by a factor of about 10.

This was true across all five age groups studied (range among the groups [starting with age 16], 9.0-17.2).

The risk for severe COVID-19 in the primary analysis decreased in the booster group by a factor of 17.9 (95% confidence interval, 15.1-21.2), among those aged 60 years or older. Risk for severe illness in those ages 40-59 was lower by a factor of 21.7 (95% CI, 10.6-44.2).

Among the 60 and older age group, risk for death was also reduced by a factor of 14.7 (95% CI, 10.0-21.4).

Researchers analyzed data for the period from July 30 to Oct. 10, 2021, from the Israel Ministry of Health database on 4.69 million people at least 16 years old who had received two Pfizer doses at least 5 months earlier.

In the main analysis, the researchers compared the rates of confirmed COVID-19, severe disease, and death among those who had gotten a booster at least 12 days earlier with the rates in a nonbooster group.

The authors wrote: “Booster vaccination programs may provide a way to control transmission without costly social-distancing measures and quarantines. Our findings provide evidence for the short-term effectiveness of the booster dose against the currently dominant Delta variant in persons 16 years of age or older.”
 

Death risk down by 90%

A second study, led by Ronen Arbel, PhD, with the community medical services division, Clalit Health Services (CHS), Tel Aviv, which included more than 800,000 participants, also found mortality risk was greatly reduced among those who received the booster compared with those who didn’t get the booster.

Participants aged 50 years or older who received a booster at least 5 months after a second Pfizer dose had 90% lower mortality risk because of COVID-19 than participants who did not get the booster.

The adjusted hazard ratio for death as a result of COVID-19 in the booster group, as compared with the nonbooster group, was 0.10 (95% CI, 0.07-0.14; P < .001). Of the 843,208 eligible participants, 758,118 (90%) received the booster during the 54-day study period.

The study included all CHS members who were aged 50 years or older on the study start date and had received two Pfizer doses at least 5 months earlier. CHS covers about 52% of the Israeli population and is the largest of four health care organizations in Israel that provide mandatory health care.

The authors noted that, although the study period was only 54 days (Aug. 6–Sept. 29), during that time “the incidence of COVID-19 in Israel was one of the highest in the world.”

The authors of both original articles pointed out that the studies are limited by short time periods and that longer-term studies are needed to see how the booster shots stand up to known and future variants, such as Omicron.

None of the authors involved in both studies reported relevant financial relationships.

A version of this article first appeared on Medscape.com.

The Pfizer/BioNTech booster lowers the risk for confirmed illness, severe illness, and death from COVID-19, according to two large studies from Israel published Dec. 8, 2021, in the New England Journal of Medicine.

Both studies were completed before the advent of the Omicron variant.

In one study that included data on more than 4 million patients, led by Yinon M. Bar-On, MSc, of the Weizmann Institute of Science in Rehovot, Israel, the rate of confirmed SARS-CoV-2 infection was lower in the booster group than in the nonbooster group by a factor of about 10.

This was true across all five age groups studied (range among the groups [starting with age 16], 9.0-17.2).

The risk for severe COVID-19 in the primary analysis decreased in the booster group by a factor of 17.9 (95% confidence interval, 15.1-21.2), among those aged 60 years or older. Risk for severe illness in those ages 40-59 was lower by a factor of 21.7 (95% CI, 10.6-44.2).

Among the 60 and older age group, risk for death was also reduced by a factor of 14.7 (95% CI, 10.0-21.4).

Researchers analyzed data for the period from July 30 to Oct. 10, 2021, from the Israel Ministry of Health database on 4.69 million people at least 16 years old who had received two Pfizer doses at least 5 months earlier.

In the main analysis, the researchers compared the rates of confirmed COVID-19, severe disease, and death among those who had gotten a booster at least 12 days earlier with the rates in a nonbooster group.

The authors wrote: “Booster vaccination programs may provide a way to control transmission without costly social-distancing measures and quarantines. Our findings provide evidence for the short-term effectiveness of the booster dose against the currently dominant Delta variant in persons 16 years of age or older.”
 

Death risk down by 90%

A second study, led by Ronen Arbel, PhD, with the community medical services division, Clalit Health Services (CHS), Tel Aviv, which included more than 800,000 participants, also found mortality risk was greatly reduced among those who received the booster compared with those who didn’t get the booster.

Participants aged 50 years or older who received a booster at least 5 months after a second Pfizer dose had 90% lower mortality risk because of COVID-19 than participants who did not get the booster.

The adjusted hazard ratio for death as a result of COVID-19 in the booster group, as compared with the nonbooster group, was 0.10 (95% CI, 0.07-0.14; P < .001). Of the 843,208 eligible participants, 758,118 (90%) received the booster during the 54-day study period.

The study included all CHS members who were aged 50 years or older on the study start date and had received two Pfizer doses at least 5 months earlier. CHS covers about 52% of the Israeli population and is the largest of four health care organizations in Israel that provide mandatory health care.

The authors noted that, although the study period was only 54 days (Aug. 6–Sept. 29), during that time “the incidence of COVID-19 in Israel was one of the highest in the world.”

The authors of both original articles pointed out that the studies are limited by short time periods and that longer-term studies are needed to see how the booster shots stand up to known and future variants, such as Omicron.

None of the authors involved in both studies reported relevant financial relationships.

A version of this article first appeared on Medscape.com.

The 7-year-old boy sat at the edge of a stretcher in the emergency department, looking miserable, as his mother recounted his symptoms to a senior resident physician on duty. Low-grade fever, fatigue, and myalgias prompted rapid SARS-CoV-2 testing at his school. That test, as well as a repeat test at the pediatrician’s office, were negative. A triage protocol in the emergency department prompted a third test, which was also negative.

“Everyone has told me that it’s likely just a different virus,” the mother said. “But then his cheek started to swell. Have you ever seen anything like this?”

The boy turned his head, revealing a diffuse swelling that extended down his right cheek to the angle of his jaw.

“Only in textbooks,” the resident physician responded.

It is a credit to our national immunization program that most practicing clinicians have never actually seen a case of mumps. Before vaccination was introduced in 1967, infection in childhood was nearly universal. Unilateral or bilateral tender swelling of the parotid gland is the typical clinical finding. Low-grade fever, myalgias, decreased appetite, malaise, and headache may precede parotid swelling in some patients. Other patients infected with mumps may have only respiratory symptoms, and some may have no symptoms at all.

Two doses of measles-mumps-rubella vaccine have been recommended for children in the United States since 1989, with the first dose administered at 12-15 months of age. According to data collected through the National Immunization Survey, more than 92% of children in the United States receive at least one dose of measles-mumps-rubella vaccine by 24 months of age. The vaccine is immunogenic, with 94% of recipients developing measurable mumps antibody (range, 89%-97%). The vaccine has been a public health success: Overall, mumps cases declined more than 99% between 1967 and 2005.

But in the mid-2000s, mumps cases started to rise again, with more than 28,000 reported between 2007 and 2019. Annual cases ranged from 229 to 6,369 and while large, localized outbreaks have contributed to peak years, mumps has been reported from all 50 states and the District of Columbia. According to a recently published paper in Pediatrics, nearly a third of these cases occurred in children <18 years of age and most had been appropriately immunized for age.

Of the 9,172 cases reported in children, 5,461 or 60% occurred between 2015 and 2019. Of these, 55% were in boys. While cases occurred in children of all ages, 54% were in children 11-17 years of age, and 33% were in children 5-10 years of age. Non-Hispanic Asian and/or Pacific Islander children accounted for 38% of cases. Only 2% of cases were associated with international travel and were presumed to have been acquired outside the United States

The reason for the increase in mumps cases in recent years is not well understood. Outbreaks in fully immunized college students have prompted concern about poor B-cell memory after vaccination resulting in waning immunity over time. In the past, antibodies against mumps were boosted by exposure to wild-type mumps virus but such exposures have become fortunately rare for most of us. Cases in recently immunized children suggest there is more to the story. Notably, there is a mismatch between the genotype A mumps virus contained in the current MMR and MMRV vaccines and the genotype G virus currently circulating in the United States.

With the onset of the pandemic and implementation of mitigation measures to prevent the spread of COVID-19, circulation of some common respiratory viruses, including respiratory syncytial virus and influenza, was sharply curtailed. Mumps continued to circulate, albeit at reduced levels, with 616 cases reported in 2020. In 2021, 30 states and jurisdictions reported 139 cases through Dec. 1.

Clinicians should suspect mumps in all cases of parotitis, regardless of an individual’s age, vaccination status, or travel history. Laboratory testing is required to distinguish mumps from other infectious and noninfectious causes of parotitis. Infectious causes include gram-positive and gram-negative bacterial infection, as well as other viral infections, including Epstein-Barr virus, coxsackie viruses, parainfluenza, and rarely, influenza. Case reports also describe parotitis coincident with SARS-CoV-2 infection.

When parotitis has been present for 3 days or less, a buccal swab for RT-PCR should be obtained, massaging the parotid gland for 30 seconds before specimen collection. When parotitis has been present for >3 days, a mumps Immunoglobulin M serum antibody should be collected in addition to the buccal swab PCR. A negative IgM does not exclude the possibility of infection, especially in immunized individuals. Mumps is a nationally notifiable disease, and all confirmed and suspect cases should be reported to the state or local health department.

Back in the emergency department, the mother was counseled about the potential diagnosis of mumps and the need for her son to isolate at home for 5 days after the onset of the parotid swelling. She was also educated about potential complications of mumps, including orchitis, aseptic meningitis and encephalitis, and hearing loss. Fortunately, complications are less common in individuals who have been immunized, and orchitis rarely occurs in prepubertal boys.

The resident physician also confirmed that other members of the household had been appropriately immunized for age. While the MMR vaccine does not prevent illness in those already infected with mumps and is not indicated as postexposure prophylaxis, providing vaccine to those not already immunized can protect against future exposures. A third dose of MMR vaccine is only indicated in the setting of an outbreak and when specifically recommended by public health authorities for those deemed to be in a high-risk group. Additional information about mumps is available at www.cdc.gov/mumps/hcp.html#report.
 

Dr. Bryant is a pediatrician specializing in infectious diseases at the University of Louisville (Ky.) and Norton Children’s Hospital, also in Louisville. She said she had no relevant financial disclosures. Email her at pdnews@mdedge.com.

The 7-year-old boy sat at the edge of a stretcher in the emergency department, looking miserable, as his mother recounted his symptoms to a senior resident physician on duty. Low-grade fever, fatigue, and myalgias prompted rapid SARS-CoV-2 testing at his school. That test, as well as a repeat test at the pediatrician’s office, were negative. A triage protocol in the emergency department prompted a third test, which was also negative.

“Everyone has told me that it’s likely just a different virus,” the mother said. “But then his cheek started to swell. Have you ever seen anything like this?”

The boy turned his head, revealing a diffuse swelling that extended down his right cheek to the angle of his jaw.

“Only in textbooks,” the resident physician responded.

It is a credit to our national immunization program that most practicing clinicians have never actually seen a case of mumps. Before vaccination was introduced in 1967, infection in childhood was nearly universal. Unilateral or bilateral tender swelling of the parotid gland is the typical clinical finding. Low-grade fever, myalgias, decreased appetite, malaise, and headache may precede parotid swelling in some patients. Other patients infected with mumps may have only respiratory symptoms, and some may have no symptoms at all.

Two doses of measles-mumps-rubella vaccine have been recommended for children in the United States since 1989, with the first dose administered at 12-15 months of age. According to data collected through the National Immunization Survey, more than 92% of children in the United States receive at least one dose of measles-mumps-rubella vaccine by 24 months of age. The vaccine is immunogenic, with 94% of recipients developing measurable mumps antibody (range, 89%-97%). The vaccine has been a public health success: Overall, mumps cases declined more than 99% between 1967 and 2005.

But in the mid-2000s, mumps cases started to rise again, with more than 28,000 reported between 2007 and 2019. Annual cases ranged from 229 to 6,369 and while large, localized outbreaks have contributed to peak years, mumps has been reported from all 50 states and the District of Columbia. According to a recently published paper in Pediatrics, nearly a third of these cases occurred in children <18 years of age and most had been appropriately immunized for age.

Of the 9,172 cases reported in children, 5,461 or 60% occurred between 2015 and 2019. Of these, 55% were in boys. While cases occurred in children of all ages, 54% were in children 11-17 years of age, and 33% were in children 5-10 years of age. Non-Hispanic Asian and/or Pacific Islander children accounted for 38% of cases. Only 2% of cases were associated with international travel and were presumed to have been acquired outside the United States

The reason for the increase in mumps cases in recent years is not well understood. Outbreaks in fully immunized college students have prompted concern about poor B-cell memory after vaccination resulting in waning immunity over time. In the past, antibodies against mumps were boosted by exposure to wild-type mumps virus but such exposures have become fortunately rare for most of us. Cases in recently immunized children suggest there is more to the story. Notably, there is a mismatch between the genotype A mumps virus contained in the current MMR and MMRV vaccines and the genotype G virus currently circulating in the United States.

With the onset of the pandemic and implementation of mitigation measures to prevent the spread of COVID-19, circulation of some common respiratory viruses, including respiratory syncytial virus and influenza, was sharply curtailed. Mumps continued to circulate, albeit at reduced levels, with 616 cases reported in 2020. In 2021, 30 states and jurisdictions reported 139 cases through Dec. 1.

Clinicians should suspect mumps in all cases of parotitis, regardless of an individual’s age, vaccination status, or travel history. Laboratory testing is required to distinguish mumps from other infectious and noninfectious causes of parotitis. Infectious causes include gram-positive and gram-negative bacterial infection, as well as other viral infections, including Epstein-Barr virus, coxsackie viruses, parainfluenza, and rarely, influenza. Case reports also describe parotitis coincident with SARS-CoV-2 infection.

When parotitis has been present for 3 days or less, a buccal swab for RT-PCR should be obtained, massaging the parotid gland for 30 seconds before specimen collection. When parotitis has been present for >3 days, a mumps Immunoglobulin M serum antibody should be collected in addition to the buccal swab PCR. A negative IgM does not exclude the possibility of infection, especially in immunized individuals. Mumps is a nationally notifiable disease, and all confirmed and suspect cases should be reported to the state or local health department.

Back in the emergency department, the mother was counseled about the potential diagnosis of mumps and the need for her son to isolate at home for 5 days after the onset of the parotid swelling. She was also educated about potential complications of mumps, including orchitis, aseptic meningitis and encephalitis, and hearing loss. Fortunately, complications are less common in individuals who have been immunized, and orchitis rarely occurs in prepubertal boys.

The resident physician also confirmed that other members of the household had been appropriately immunized for age. While the MMR vaccine does not prevent illness in those already infected with mumps and is not indicated as postexposure prophylaxis, providing vaccine to those not already immunized can protect against future exposures. A third dose of MMR vaccine is only indicated in the setting of an outbreak and when specifically recommended by public health authorities for those deemed to be in a high-risk group. Additional information about mumps is available at www.cdc.gov/mumps/hcp.html#report.
 

Dr. Bryant is a pediatrician specializing in infectious diseases at the University of Louisville (Ky.) and Norton Children’s Hospital, also in Louisville. She said she had no relevant financial disclosures. Email her at pdnews@mdedge.com.

The 7-year-old boy sat at the edge of a stretcher in the emergency department, looking miserable, as his mother recounted his symptoms to a senior resident physician on duty. Low-grade fever, fatigue, and myalgias prompted rapid SARS-CoV-2 testing at his school. That test, as well as a repeat test at the pediatrician’s office, were negative. A triage protocol in the emergency department prompted a third test, which was also negative.

“Everyone has told me that it’s likely just a different virus,” the mother said. “But then his cheek started to swell. Have you ever seen anything like this?”

The boy turned his head, revealing a diffuse swelling that extended down his right cheek to the angle of his jaw.

“Only in textbooks,” the resident physician responded.

It is a credit to our national immunization program that most practicing clinicians have never actually seen a case of mumps. Before vaccination was introduced in 1967, infection in childhood was nearly universal. Unilateral or bilateral tender swelling of the parotid gland is the typical clinical finding. Low-grade fever, myalgias, decreased appetite, malaise, and headache may precede parotid swelling in some patients. Other patients infected with mumps may have only respiratory symptoms, and some may have no symptoms at all.

Two doses of measles-mumps-rubella vaccine have been recommended for children in the United States since 1989, with the first dose administered at 12-15 months of age. According to data collected through the National Immunization Survey, more than 92% of children in the United States receive at least one dose of measles-mumps-rubella vaccine by 24 months of age. The vaccine is immunogenic, with 94% of recipients developing measurable mumps antibody (range, 89%-97%). The vaccine has been a public health success: Overall, mumps cases declined more than 99% between 1967 and 2005.

But in the mid-2000s, mumps cases started to rise again, with more than 28,000 reported between 2007 and 2019. Annual cases ranged from 229 to 6,369 and while large, localized outbreaks have contributed to peak years, mumps has been reported from all 50 states and the District of Columbia. According to a recently published paper in Pediatrics, nearly a third of these cases occurred in children <18 years of age and most had been appropriately immunized for age.

Of the 9,172 cases reported in children, 5,461 or 60% occurred between 2015 and 2019. Of these, 55% were in boys. While cases occurred in children of all ages, 54% were in children 11-17 years of age, and 33% were in children 5-10 years of age. Non-Hispanic Asian and/or Pacific Islander children accounted for 38% of cases. Only 2% of cases were associated with international travel and were presumed to have been acquired outside the United States

The reason for the increase in mumps cases in recent years is not well understood. Outbreaks in fully immunized college students have prompted concern about poor B-cell memory after vaccination resulting in waning immunity over time. In the past, antibodies against mumps were boosted by exposure to wild-type mumps virus but such exposures have become fortunately rare for most of us. Cases in recently immunized children suggest there is more to the story. Notably, there is a mismatch between the genotype A mumps virus contained in the current MMR and MMRV vaccines and the genotype G virus currently circulating in the United States.

With the onset of the pandemic and implementation of mitigation measures to prevent the spread of COVID-19, circulation of some common respiratory viruses, including respiratory syncytial virus and influenza, was sharply curtailed. Mumps continued to circulate, albeit at reduced levels, with 616 cases reported in 2020. In 2021, 30 states and jurisdictions reported 139 cases through Dec. 1.

Clinicians should suspect mumps in all cases of parotitis, regardless of an individual’s age, vaccination status, or travel history. Laboratory testing is required to distinguish mumps from other infectious and noninfectious causes of parotitis. Infectious causes include gram-positive and gram-negative bacterial infection, as well as other viral infections, including Epstein-Barr virus, coxsackie viruses, parainfluenza, and rarely, influenza. Case reports also describe parotitis coincident with SARS-CoV-2 infection.

When parotitis has been present for 3 days or less, a buccal swab for RT-PCR should be obtained, massaging the parotid gland for 30 seconds before specimen collection. When parotitis has been present for >3 days, a mumps Immunoglobulin M serum antibody should be collected in addition to the buccal swab PCR. A negative IgM does not exclude the possibility of infection, especially in immunized individuals. Mumps is a nationally notifiable disease, and all confirmed and suspect cases should be reported to the state or local health department.

Back in the emergency department, the mother was counseled about the potential diagnosis of mumps and the need for her son to isolate at home for 5 days after the onset of the parotid swelling. She was also educated about potential complications of mumps, including orchitis, aseptic meningitis and encephalitis, and hearing loss. Fortunately, complications are less common in individuals who have been immunized, and orchitis rarely occurs in prepubertal boys.

The resident physician also confirmed that other members of the household had been appropriately immunized for age. While the MMR vaccine does not prevent illness in those already infected with mumps and is not indicated as postexposure prophylaxis, providing vaccine to those not already immunized can protect against future exposures. A third dose of MMR vaccine is only indicated in the setting of an outbreak and when specifically recommended by public health authorities for those deemed to be in a high-risk group. Additional information about mumps is available at www.cdc.gov/mumps/hcp.html#report.
 

Dr. Bryant is a pediatrician specializing in infectious diseases at the University of Louisville (Ky.) and Norton Children’s Hospital, also in Louisville. She said she had no relevant financial disclosures. Email her at pdnews@mdedge.com.

A raft of new studies that looked at the ability of Omicron to evade an array of currently available vaccines suggest a substantial loss of protection against the highly mutated variant.

Medscape Illustration/Dreamstime

The new studies, from teams of researchers in Germany, South Africa, Sweden, and the drug company Pfizer, showed 25 to 40-fold drops in the ability of antibodies created by two doses of the Pfizer-BioNTech vaccine to neutralize the virus.  

But there seemed to be a bright spot in the studies too. The virus didn’t completely escape the immunity from the vaccines, and giving a third, booster dose appeared to restore antibodies to a level that’s been associated with protection against variants in the past.

“One of the silver linings of this pandemic so far is that mRNA vaccines manufactured based on the ancestral SARS-CoV-2 continue to work in the laboratory and, importantly, in real life against variant strains,” said Hana El Sahly, MD, professor of molecular virology and microbiology at Baylor College of Medicine in Houston. “The strains so far vary by their degree of being neutralized by the antibodies from these vaccines, but they are being neutralized nonetheless.” 

Dr. El Sahly points out that the Beta variant was associated with a 10-fold drop in antibodies, but two doses of the vaccines still protected against it.

President Biden hailed the study results as good news.

“That Pfizer lab report came back saying that the expectation is that the existing vaccines protect against Omicron. But if you get the booster, you’re really in good shape. And so that’s very encouraging,” he said in a press briefing Dec. 8.
 

More research needed

Other scientists, however, stressed that these studies are from lab tests, and don’t necessarily reflect what will happen with Omicron in the real world. They cautioned about a worldwide push for boosters with so many countries still struggling to give first doses of vaccines.

Soumya Swaminathan, MD, chief scientist for the World Health Organization, stressed in a press briefing Dec. 8 that the results from the four studies varied widely, showing dips in neutralizing activity with Omicron that ranged from 5-fold to 40-fold.

The types of lab tests that were run were different, too, and involved small numbers of blood samples from patients.

She stressed that immunity depends not just on neutralizing antibodies, which act as a first line of defense when a virus invades, but also on B cells and T cells, and so far, tests show that these crucial components — which are important for preventing severe disease and death — had been less impacted than antibodies.

“So, I think it’s premature to conclude that this reduction in neutralizing activity would result in a significant reduction in vaccine effectiveness,” she said.

Whether or not these first-generation vaccines will be enough to stop Omicron, though, remains to be seen. A study of the Pfizer, Moderna, and AstraZeneca vaccines, led by German physician Sandra Ciesek, MD, who directs the Institute of Medical Virology at the University of Frankfurt, shows a booster didn’t appear to hold up well over time.

Dr. Ciesek and her team exposed Omicron viruses to the antibodies of volunteers who had been boosted with the Pfizer vaccine 3 months prior.  

She also compared the results to what happened to those same 3-month antibody levels against Delta variant viruses. She found only a 25% neutralization of Omicron compared with a 95% neutralization of Delta. That represented about a 37-fold reduction in the ability of the antibodies to neutralize Omicron vs Delta.

“The data confirm that developing a vaccine adapted for Omicron makes sense,” she tweeted as part of a long thread she posted on her results.
 

Retool the vaccines?

Both Pfizer and Moderna are retooling their vaccines to better match them to the changes in the Omicron variant. In a press release, Pfizer said it could start deliveries of that updated vaccine by March, pending U.S. Food and Drug Administration authorization.

“What the booster really does in neutralizing Omicron right now, they don’t know, they have no idea,” said Peter Palese, PhD, chair of the department of microbiology at the Mount Sinai School of Medicine in New York City.

Dr. Palese said he was definitely concerned about a possible Omicron wave.

“There are four major sites on the spike protein targeted by antibodies from the vaccines, and all four sites have mutations,” he said. “All these important antigenic sites are changed.

“If Omicron becomes the new Delta, and the old vaccines really aren’t good enough, then we have to make new Omicron vaccines. Then we have to revaccinate everybody twice,” he said, and the costs could be staggering. “I am worried.”

Tedros Adhanom Ghebreyesus, PhD, director general of the WHO, urged countries to move quickly.

“Don’t wait. Act now,” he said, even before all the science is in hand. “All of us, every government, every individual should use all the tools we have right now,” to drive down transmission, increase testing and surveillance, and share scientific findings.

“We can prevent Omicron [from] becoming a global crisis right now,” he said.

A version of this article first appeared on Medscape.com.

A raft of new studies that looked at the ability of Omicron to evade an array of currently available vaccines suggest a substantial loss of protection against the highly mutated variant.

Medscape Illustration/Dreamstime

The new studies, from teams of researchers in Germany, South Africa, Sweden, and the drug company Pfizer, showed 25 to 40-fold drops in the ability of antibodies created by two doses of the Pfizer-BioNTech vaccine to neutralize the virus.  

But there seemed to be a bright spot in the studies too. The virus didn’t completely escape the immunity from the vaccines, and giving a third, booster dose appeared to restore antibodies to a level that’s been associated with protection against variants in the past.

“One of the silver linings of this pandemic so far is that mRNA vaccines manufactured based on the ancestral SARS-CoV-2 continue to work in the laboratory and, importantly, in real life against variant strains,” said Hana El Sahly, MD, professor of molecular virology and microbiology at Baylor College of Medicine in Houston. “The strains so far vary by their degree of being neutralized by the antibodies from these vaccines, but they are being neutralized nonetheless.” 

Dr. El Sahly points out that the Beta variant was associated with a 10-fold drop in antibodies, but two doses of the vaccines still protected against it.

President Biden hailed the study results as good news.

“That Pfizer lab report came back saying that the expectation is that the existing vaccines protect against Omicron. But if you get the booster, you’re really in good shape. And so that’s very encouraging,” he said in a press briefing Dec. 8.
 

More research needed

Other scientists, however, stressed that these studies are from lab tests, and don’t necessarily reflect what will happen with Omicron in the real world. They cautioned about a worldwide push for boosters with so many countries still struggling to give first doses of vaccines.

Soumya Swaminathan, MD, chief scientist for the World Health Organization, stressed in a press briefing Dec. 8 that the results from the four studies varied widely, showing dips in neutralizing activity with Omicron that ranged from 5-fold to 40-fold.

The types of lab tests that were run were different, too, and involved small numbers of blood samples from patients.

She stressed that immunity depends not just on neutralizing antibodies, which act as a first line of defense when a virus invades, but also on B cells and T cells, and so far, tests show that these crucial components — which are important for preventing severe disease and death — had been less impacted than antibodies.

“So, I think it’s premature to conclude that this reduction in neutralizing activity would result in a significant reduction in vaccine effectiveness,” she said.

Whether or not these first-generation vaccines will be enough to stop Omicron, though, remains to be seen. A study of the Pfizer, Moderna, and AstraZeneca vaccines, led by German physician Sandra Ciesek, MD, who directs the Institute of Medical Virology at the University of Frankfurt, shows a booster didn’t appear to hold up well over time.

Dr. Ciesek and her team exposed Omicron viruses to the antibodies of volunteers who had been boosted with the Pfizer vaccine 3 months prior.  

She also compared the results to what happened to those same 3-month antibody levels against Delta variant viruses. She found only a 25% neutralization of Omicron compared with a 95% neutralization of Delta. That represented about a 37-fold reduction in the ability of the antibodies to neutralize Omicron vs Delta.

“The data confirm that developing a vaccine adapted for Omicron makes sense,” she tweeted as part of a long thread she posted on her results.
 

Retool the vaccines?

Both Pfizer and Moderna are retooling their vaccines to better match them to the changes in the Omicron variant. In a press release, Pfizer said it could start deliveries of that updated vaccine by March, pending U.S. Food and Drug Administration authorization.

“What the booster really does in neutralizing Omicron right now, they don’t know, they have no idea,” said Peter Palese, PhD, chair of the department of microbiology at the Mount Sinai School of Medicine in New York City.

Dr. Palese said he was definitely concerned about a possible Omicron wave.

“There are four major sites on the spike protein targeted by antibodies from the vaccines, and all four sites have mutations,” he said. “All these important antigenic sites are changed.

“If Omicron becomes the new Delta, and the old vaccines really aren’t good enough, then we have to make new Omicron vaccines. Then we have to revaccinate everybody twice,” he said, and the costs could be staggering. “I am worried.”

Tedros Adhanom Ghebreyesus, PhD, director general of the WHO, urged countries to move quickly.

“Don’t wait. Act now,” he said, even before all the science is in hand. “All of us, every government, every individual should use all the tools we have right now,” to drive down transmission, increase testing and surveillance, and share scientific findings.

“We can prevent Omicron [from] becoming a global crisis right now,” he said.

A version of this article first appeared on Medscape.com.

A raft of new studies that looked at the ability of Omicron to evade an array of currently available vaccines suggest a substantial loss of protection against the highly mutated variant.

Medscape Illustration/Dreamstime

The new studies, from teams of researchers in Germany, South Africa, Sweden, and the drug company Pfizer, showed 25 to 40-fold drops in the ability of antibodies created by two doses of the Pfizer-BioNTech vaccine to neutralize the virus.  

But there seemed to be a bright spot in the studies too. The virus didn’t completely escape the immunity from the vaccines, and giving a third, booster dose appeared to restore antibodies to a level that’s been associated with protection against variants in the past.

“One of the silver linings of this pandemic so far is that mRNA vaccines manufactured based on the ancestral SARS-CoV-2 continue to work in the laboratory and, importantly, in real life against variant strains,” said Hana El Sahly, MD, professor of molecular virology and microbiology at Baylor College of Medicine in Houston. “The strains so far vary by their degree of being neutralized by the antibodies from these vaccines, but they are being neutralized nonetheless.” 

Dr. El Sahly points out that the Beta variant was associated with a 10-fold drop in antibodies, but two doses of the vaccines still protected against it.

President Biden hailed the study results as good news.

“That Pfizer lab report came back saying that the expectation is that the existing vaccines protect against Omicron. But if you get the booster, you’re really in good shape. And so that’s very encouraging,” he said in a press briefing Dec. 8.
 

More research needed

Other scientists, however, stressed that these studies are from lab tests, and don’t necessarily reflect what will happen with Omicron in the real world. They cautioned about a worldwide push for boosters with so many countries still struggling to give first doses of vaccines.

Soumya Swaminathan, MD, chief scientist for the World Health Organization, stressed in a press briefing Dec. 8 that the results from the four studies varied widely, showing dips in neutralizing activity with Omicron that ranged from 5-fold to 40-fold.

The types of lab tests that were run were different, too, and involved small numbers of blood samples from patients.

She stressed that immunity depends not just on neutralizing antibodies, which act as a first line of defense when a virus invades, but also on B cells and T cells, and so far, tests show that these crucial components — which are important for preventing severe disease and death — had been less impacted than antibodies.

“So, I think it’s premature to conclude that this reduction in neutralizing activity would result in a significant reduction in vaccine effectiveness,” she said.

Whether or not these first-generation vaccines will be enough to stop Omicron, though, remains to be seen. A study of the Pfizer, Moderna, and AstraZeneca vaccines, led by German physician Sandra Ciesek, MD, who directs the Institute of Medical Virology at the University of Frankfurt, shows a booster didn’t appear to hold up well over time.

Dr. Ciesek and her team exposed Omicron viruses to the antibodies of volunteers who had been boosted with the Pfizer vaccine 3 months prior.  

She also compared the results to what happened to those same 3-month antibody levels against Delta variant viruses. She found only a 25% neutralization of Omicron compared with a 95% neutralization of Delta. That represented about a 37-fold reduction in the ability of the antibodies to neutralize Omicron vs Delta.

“The data confirm that developing a vaccine adapted for Omicron makes sense,” she tweeted as part of a long thread she posted on her results.
 

Retool the vaccines?

Both Pfizer and Moderna are retooling their vaccines to better match them to the changes in the Omicron variant. In a press release, Pfizer said it could start deliveries of that updated vaccine by March, pending U.S. Food and Drug Administration authorization.

“What the booster really does in neutralizing Omicron right now, they don’t know, they have no idea,” said Peter Palese, PhD, chair of the department of microbiology at the Mount Sinai School of Medicine in New York City.

Dr. Palese said he was definitely concerned about a possible Omicron wave.

“There are four major sites on the spike protein targeted by antibodies from the vaccines, and all four sites have mutations,” he said. “All these important antigenic sites are changed.

“If Omicron becomes the new Delta, and the old vaccines really aren’t good enough, then we have to make new Omicron vaccines. Then we have to revaccinate everybody twice,” he said, and the costs could be staggering. “I am worried.”

Tedros Adhanom Ghebreyesus, PhD, director general of the WHO, urged countries to move quickly.

“Don’t wait. Act now,” he said, even before all the science is in hand. “All of us, every government, every individual should use all the tools we have right now,” to drive down transmission, increase testing and surveillance, and share scientific findings.

“We can prevent Omicron [from] becoming a global crisis right now,” he said.

A version of this article first appeared on Medscape.com.