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A comment on Cloth masks do protect the wearer. Parent comment

Re:Cloth masks do protect the wearer by roywiggins on Monday August 31, 2020 @07:23PM (#24336906)
Not in COVID, but it's been demonstrated in other viruses. You can't do a challenge study with COVID, so the quality of evidence in COVID is going to be less.

https://www.latimes.com/california/story/2020-07-21/masks-he...

Variolation is much safer than being exposed to smallpox in the normal way:

https://en.m.wikipedia.org/wiki/Variolation

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