[GrandJediMasterYoda]

I heard masks stop bacteria but not viruses. Any microbiologists here who can confirm this? I would assume it’s true as when you breathe in a virus that is only 20 nanometers long it can easily pass through the fibers, a mask is not solid.

[Buckeye McFrog]

Any microbiologists here who can confirm this?

Unfortunately what you'll get is a muddle and a scrum, because science, like everything else in this country, has now been totally, completely politicized. The media and "big tech" will censor out the opinions they don't like and what's left will become the "consensus".

[Socon-Econ]

I heard masks stop bacteria but not viruses. Any microbiologists here who can confirm this? I would assume it’s true as when you breathe in a virus that is only 20 nanometers long it can easily pass through the fibers, a mask is not solid.
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It doesn’t take an expert to see that the problem isn’t that the fabric of an everyday mask cannot filter viruses. The masks are far from air tight. You can’t breathe thru the fabric itself, so you are inhaling and around the edges of the mask. That’s why glasses fog up.