3 ms·
It was especially confusing when my company at the time (in sfbay area) hired someone to tell us that masks won't help because viruses are small and also we'll
by winrid 5y ago
It was especially confusing when my company at the time (in sfbay area) hired someone to tell us that masks won't help because viruses are small and also we'll be back in the office soon. :)
- sampo 5y ago> to tell us that masks won't help because viruses are small It's actually 0.3 micrometer particles that are most difficult to filter. Smaller than that, particles start to dance around and not move smoothly, because of Brownian motion, so they get stuck in the filtering fibers better. https://www.researchgate.net/figure/Typical-filter-efficiency-as-a-function-of-particle-size-modified-from-Zevenhoven-and_fig8_266099381 https://www.researchgate.net/figure/Typical-filter-efficienc...
- tzs 5y agoHere's a short explanation of how some of the mechanisms mention in that diagram work [1]. [1] https://donaldsonaerospace-defense.com/library/files/documents/pdfs/042665.pdf https://donaldsonaerospace-defense.com/library/files/documen...