On Apr. 30, 2021, Moderna announced that the World Health Organization (WHO) had issued Emergency Use Listing (EUL) for its COVID-19 vaccine to prevent COVID-19 in individuals 18 years of age and older.

The Moderna vaccine is an mNRA-based vaccine. It was found by the SAGE to have an efficacy of efficacy of 94.1%, based on a median follow-up of two months. Although the vaccine is provided as a frozen suspension at –25 ºC to –15 ºC in a multidose vial, vials can be stored refrigerated at 2–8 °C for up to 30 days prior to withdrawal of the first dose, meaning that ultra-cold chain equipment may not always be necessary to deploy the vaccine.