An independent panel of experts advising the Food and Drug Administration voted on Thursday to recommend a booster shot for many recipients of the Moderna coronavirus vaccine, and on Friday to recommend authorizing booster shots of Johnson & Johnson’s one-dose coronavirus vaccine for people 18 years or older, at least two months after the first dose.
So what happens now? There are further steps at the F.D.A., then steps at the Centers for Disease Control and Prevention, and the process ends with the states. Here’s how it breaks down.
The F.D.A., a federal agency of the Department of