Mask research during COVID-19: Hypothesis - masks work Observation - not inconsistent with masks working Conclusion - masks work QED
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The single layer cotton masks - there is no evidence they work. Saying “it can’t hurt” isnot proof. Thought experiments aren’t proof. It’s a good way to talk people into crowding.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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The way I've been describing mask mandates is as a free lottery ticket. They might help a lot, and they're very low risk, so we shouldn't require very strong evidence to adopt them.
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Like chloroquine but with a plausible mechanism of action and lower risk
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