4 ms·
If you are going to wear a mask get a p100 [0]. Removes 99.97% of all particles that are 0.3 microns in diameter or larger. The lame part is covid is: 0.06 mi
by ransom1538 6y ago
If you are going to wear a mask get a p100 [0]. Removes 99.97% of all particles that are 0.3 microns in diameter or larger. The lame part is covid is: 0.06 microns to .14 microns [1]. In theory though covid will be attached to a larger particle.
https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part/p100list1.html https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part...
https://www.usatoday.com/story/news/factcheck/2020/06/11/fact-check-n-95-filters-not-too-large-stop-covid-19-particles/5343537002/ https://www.usatoday.com/story/news/factcheck/2020/06/11/fac...
- imglorp 6y agoBe aware many of those masks in the CDC list have one-way valves that cause exhalations to be unfiltered. If the wearer is infectious, it doesn't protect people they encounter.
- onecommentman 6y agoYou can close those valves with a simple “hack”. The N95 woodworker mask I have has a plastic guard over the valve. Cut the guard and use an adhesive (I use Sugru) to close the valve. Ugly but effective, and visibly shows the valve has been shut...
- robjan 6y agoThe masks are to protect people from you, not the other way around. Many N9x masks have valves which partially defeat the purpose of mask wearing.