On Nov. 16, 2020, Moderna announced new data showing that mRNA-1273, its COVID-19 vaccine candidate, remains stable at 2ﾰ to 8ﾰC (36ﾰ to 46ﾰF), the temperature of a standard home or medical refrigerator, for 30 days.

Stability testing supports this extension from an earlier estimate of 7 days. mRNA-1273 remains stable at -20ﾰ C (-4ﾰF) for up to six months, at refrigerated conditions for up to 30 days and at room temperature for up to 12 hours.