Forgive me for stating the obvious, but apparently it’s not obvious enough:
The effectiveness of a vaccine—even the effectiveness for you, personally—doesn’t just depend on you taking it. It depends on other people taking it. The more the better.
Epidemics are complex systems, with feedback effects. https://mas.to/@gleick/113493200280387680
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I agree, can it also depend on your health, having a weak immune system may impact how a vaccine works.
