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    • How Long Is Covid Contagious?

      How Long Is Covid Contagious?

      New York Times· 1 day ago

      It’s a tricky question to answer, but experts say symptoms and rapid tests are still good guides. As we cope with our fifth Covid summer, people are once...

    • Air Transport, Insects and Disease - Nature

      Nature· 17 hours ago

      Whether A. gambiæ was actually transported in a surface vessel or in an aircraft will probably never be known, but, as the result of its entry and subsequent spread, more than 90 per cent of ...