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Moderna: Interim data show 94.5% efficacy for COVID-19 vaccine, will seek FDA EUA


Because the mRNA-1273 vaccine is stable at these refrigerator temperatures, it can be stored at most physicians’ offices, pharmacies, and hospitals, the company noted. In contrast, the similar Pfizer BTN162b2 vaccine – early results for which showed a 90% efficacy rate – requires shipment and storage at “deep-freeze” conditions of –70° C or –80° C, which is more challenging from a logistic point of view.

Moderna’s mRNA-1273 can be kept at room temperature for up to 12 hours after removal from a refrigerator for patient administration. The vaccine will not require dilution prior to use.

More than 30,000 people aged older than 18 years in the United States are enrolled in the COVE study. The research is being conducted in collaboration with the National Institute of Allergy and Infectious Diseases and the Biomedical Advanced Research and Development Authority, part of the Office of the Assistant Secretary for Preparedness and Response at the Department of Health & Human Services.

A version of this article originally appeared on


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