Yet another paper arguing that mandatory masking protects against COVID... you CANNOT do a randomized trial, so this is a natural experiment. BUT THE EVIDENCE KEEPS ACCUMULATING ...https://voxeu.org/article/unmasked-effect-face-masks-spread-covid-19 …
Countries that took flu-like protections are doing worse than countries that treated this like SARS tbh, not sure we can say same infection mechanism. So many differences, and emerging. In any case, we are going to go with natural experiments with this necessarily.
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My only position has been “masks for all” since Feb. That *ahead* of singing happy birthday twice. Flu, C19, SARS covered, I think.
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