Disconcerting to see many countries in Europe starting to heat up again, possibly reflecting, at least in part, some waning of vaccine effectivenesspic.twitter.com/Pf3ZGcW0Qg
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Personal behavior is always a significant numerical unknown factor in "by age groups" and vaxxed versus unvaxxed; in real world vaxx versus unvaxxed, it clearly makes vaxx look somewhat better than it is--we just don't know the "magnitude" of the efficacy "overestimation"
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