• roofuskit@lemmy.world
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    3 days ago

    It’s not just them, vaccines aren’t always the same level of efficacy for everyone. Even normal healthy and vaccinated people can be susceptible without strong enough herd immunity.

    • Hazor@lemmy.world
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      3 days ago

      And immunity can wane over time for some. I had to get the MMR series again when I started nursing school because I tested negative for rubella antibodies.