5 ms·
From what I understand n95 masks should work when used properly. https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html https://www.cdc.gov/coro
by James_Henry 7y ago
From what I understand n95 masks should work when used properly.
https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use...