Hours after the Food and Drug Administration (FDA) authorized a fourth shot of the Moderna and Pfizer COVID-19 vaccines for all Americans 50 and older, an FDA official said a fifth shot may be needed in the fall.
“I don’t want to shock anyone but there may be a need for people to get an additional booster in the fall, along with a more general booster campaign if that takes place, because we may need to shift over to a different variant coverage,” Dr. Peter Marks, head of the FDA center that regulates vaccines, told reporters on a call on March 29.
