US health advisers endorsed a booster of Johnson & Johnson's Covid-19 vaccine, citing concern that Americans who got the single-dose shot aren't as protected as those given two-dose brands. J&J told the Food and Drug Administration that an extra dose adds important protection as early as two months after initial vaccination — but that it might work better if people wait until six months later.from US News Headlines, Latest USA News, US news live on Times of India https://ift.tt/3lLYYsF
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