Millions of Americans are one step closer to getting a COVID-19 booster shot. The Food and Drug Administration (FDA) amended its emergency use authorization for a Pfizer booster shot Wednesday. It ...

U.S. health advisers endorsed a booster of Johnson & Johnson’s COVID-19 vaccine Friday, citing concern that Americans who got the single-dose shot aren’t as protected as those given two-dose brands. J ...

The FDA authorized a booster dose of the Pfizer-BioNTech COVID-19 vaccine on Wednesday for older Americans, healthcare workers, and others at serious risk of severe cases, following tense debates over ...