Both Pfizer and the U.S. FDA agree that the frozen, undiluted Comirnaty (Pfizer) COVID-19 vaccine can be stored at conventional freezer temperatures for up to two weeks. This means that vaccination sites don’t have to procure ultra-low cold storage equipment in order to administer the Comirnaty (Pfizer) COVID-19 vaccine, and the vaccine can get to more vaccination sites. This change does not apply to the storage of thawed vials (diluted or undiluted).