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  1. ...can test negative for up to 90 days following infection .  It might be come and go. The antibodies...don't even know how the antibodies relate to immunity . -- It's possible that some of us will never...

    1 Answers · Health · 11/01/2021

  2. ... immunity . This has two important benefits. First, with herd immunity the incidence of infections will be very, very low. Secondly, this helps to protect those people who...

    3 Answers · Science & Mathematics · 12/01/2021

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