About masks from OSHA. "what about breathing IN with an N95 mask, are you protected from the virus in the air standing next to the guy coughing? N95 masks filter 95% of inhaled particles down to 0.3 microns. The virus is 0.07-0.09 microns. Conclusion: an N95 mask will not filter the virus from the inhaled air."
There have been extensive randomized controlled trial (RCT) studies, and meta-analysis reviews of RCT studies, which all show that masks and respirators do not work to prevent respiratory influenza-like illnesses, or respiratory illnesses believed to be transmitted by droplets and aerosol particles
About masks from OSHA.
"what about breathing IN with an N95 mask, are you protected from the virus in the air standing next to the guy coughing? N95 masks filter 95% of inhaled particles down to 0.3 microns. The virus is 0.07-0.09 microns.
Conclusion: an N95 mask will not filter the virus from the inhaled air."
There have been extensive randomized controlled trial (RCT) studies, and meta-analysis reviews of RCT studies, which all show that masks and respirators do not work to prevent respiratory influenza-like illnesses, or respiratory illnesses believed to be transmitted by droplets and aerosol particles
https://www.rcreader.com/commentary/masks-dont-work-covid-a-review-of-science-relevant-to-covide-19-social-policy
(post is archived)