Pfizer COVID vaccine available in single doses to improve outreach, HHS announces

The move is designed to give physicians more flexibility in protecting patients against COVID. The Pfizer vaccine traditionally has been offered in multi-dose vials. Once a multi-dose vial of the vaccine is punctured, it must be stored at temperatures between 36°F and 77°F and discarded after 12 hours, according to the Centers for Disease Control and Prevention (CDC).