Questions tagged [facemasks]

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14
votes
3answers
1k views

Are there medical reasons for not being able to wear a surgical mask?

In countries with a mask mandate due to high COVID-19 incidences there is often some side rule in effect where you can get a medical certificate if you have some medical condition that would ...
2
votes
0answers
156 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 ...
12
votes
2answers
775 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 (...
8
votes
2answers
635 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 ...
111
votes
2answers
19k 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 ...