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Physicist Explains Why Face Masks May Stop Spitballs but Can't Stop Covid
by bill - 2020-12-06 - ( life / health / covid )
via muchadoaboutcorona.ca/spitballs/
At first, this spit-protection theory sounds valid enough; but give it two minutes of investigation and it quickly loses its credibility.
blog version — similar posts here — ... and elsewhere
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