Should You Get Another Covid Booster?

The F.D.A. has authorized additional shots for older Americans and those with certain immune deficiencies. Here’s what scientists know about who needs the doses, and when.

Credit…Kenny Holston for The New York Times

Published Updated 

Leer en español

Aiming to protect Americans who are most vulnerable to the coronavirus, the Food and Drug Administration on Tuesday authorized a second booster dose of Covid vaccine for all adults 50 and older. The agency’s decision comes as a highly contagious Omicron subvariant known as BA.2 pummels Europe and threatens to do the same to the United States.

But the scientific evidence for a fourth dose is incomplete, at best, and researchers do not agree on whether the shots are needed. Here are some factors to…

Read Story