Everyone drop what you're doing and read this one tweet. (also, CC @zeynep)https://twitter.com/politicalmath/status/1242121273397760003 …
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Also, most people in Japan are not wearing N95 masks (at least they weren't last time I was there). They wear much more comfortable masks that don't keep the virus out, but do (I imagine) reduce the amount of aerosolized saliva that the emit into the air.
Japan isn't testing widely so we do not know.
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