U.S. health advisers endorsed a booster of Johnson & Johnson's COVID-19 vaccine Friday, citing growing worry that Americans who got the single-dose shot aren't as protected as those given two-dose brands.
Johnson & Johnson’s COVID-19 vaccine may pose a “small possible risk” of a rare but potentially dangerous neurological reaction, U.S. health officials said Monday.
Johnson & Johnson’s long-awaited vaccine appears to protect against COVID-19 with just one shot – not as strong as some two-shot rivals but still potentially helpful for a world in dire need of more doses.