The Food and Drug Administration action marks the first licensing of a vaccine for the coronavirus, which that has swept the United States in repeated waves since early 2020.
As the delta variant spreads, people who had the Johnson & Johnson vaccine may be seeking a dose of an mRNA vaccine. Here’s what experts told The Washington Post about combining those vaccines.
These vaccine trials would be unlike any others: Researchers would inject healthy volunteers with an experimental vaccine and then expose them to the coronavirus.
“One of the things we’ve kind of taken for granted is that fireflies will always be here,” one firefly researcher said. “And we’ve been terribly wrong about that.”