The U.S. Food and Drug Administration approved Novavax's COVIDd-19 vaccine with age restrictions after a six-week delay.

Novavax’s shot is the only protein-based COVID vaccine available in the U.S. Until now, it had only been allowed for emergency use in people 12 and up. Unlike the mRNA vaccines from Pfizer and Moderna,

Novavax later announced the FDA instead was asking it to run an additional trial after approval, which is highly unusual. FDA did order several additional trials to be completed i