@jeffgilchrist
The cynics argue that COVID 19 virus particle size is only 0.125 microns while N95 mask supposedly only filters down to 0.3 microns, hence N95 block few virus particles, if at all. What they fail to realise is that to be airborne, the virus attaches to water droplets or aerosols that are generated by breathing, talking, coughing, etc., consisting of water, mucus protein and other biological material which are all LARGER than 1 micron.
#CynicsFail
#Cynism

https://www.usatoday.com/story/news/factcheck/2020/06/11/fact-check-n-95-filters-not-too-large-stop-covid-19-particles/5343537002/