On Mar. 26, 2021, Pfizer and BioNTech announced that the European Medicines Agency (EMA) approved storage of COMIRNATYﾮ at -25ﾰC to -15ﾰC for a total of two weeks based on data showing the stability at these temperatures in standard pharmaceutical freezers.

With this approval, the COMIRNATY vials can be stored in all 27 European Union member states at these updated temperatures for a total of two weeks alternatively to the storage at ultra-low temperatures.