J&J COVID-19 vaccine

Johnson & Johnson said on Thursday that a real-world study showed its single-shot COVID-19 vaccine protects against breakthrough infections and hospitalizations for up to six months. The study, sponsored by the vaccine…

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.…