Questions tagged [facemasks]

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30 votes
4 answers
3k views

Do surgical masks help prevent the spread of COVID-19 from infected members of the public?

One of the most politicised scientific issues of 2020 was the question about whether face-masks stop the spread of COVID-19. Here are some specific examples: Australian Department of Health (...
Oddthinking's user avatar
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6 votes
0 answers
520 views

Do cloth facemasks help prevent the spread of COVID-19 to healthy members of the public?

One of the most politicised scientific issues of 2020 was the question about whether face-masks stop the spread of COVID-19. I trust we can agree that this is notable without requiring specific ...
Oddthinking's user avatar
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110 votes
2 answers
20k views

Do facemasks cause CO2 poisoning?

I came across this video on BitChute purporting to test the CO2 levels of what appears to be a KN95 (a Non-NIOSH Approved Respirator) whilst the mask is in use. The video shows a device displaying CO2 ...
SE Does Not Like Dissent's user avatar
9 votes
2 answers
1k views

When the WHO/CDC/NIH recommended wearing cloth masks, did they cite any scientific paper supporting their effectiveness?

Background The Association of American Physicians and Surgeons asserts that cloth masks are not a way to meaningfully protect someone against COVID-19 nor against source-control. According to their ...
isakbob's user avatar
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