• traveler@lemdro.id
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    1 year ago

    With so much vaccination, how does people don’t have immunity yet?

    Even if they were not vaccinated for a while, there’s always a percentage of immunity. The virus itself is not that deadly as well.

    • FoxAndKitten@lemmy.world
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      1 year ago

      Because immunity varies by disease.

      Chicken pox? Pretty much one and done. COVID? Falls off rapidly after 3 months, whether you catch it or get the vaccine

      Plus, every mutation is a dice roll on how much existing immunity will apply. It could be exactly the same as the last strain, or the old immunity might not help at all