Paper and N95 masks do not screen out viruses..
n95s when worn properly are supposed to screen out viruses
[FONT=&][FONT=&]An N95 FFR is a type of respirator which removes particles from the air that are breathed through it. These respirators filter out at least 95% of very small (0.3 micron) particles. N95 FFRs are capable of filtering out all types of particles, including bacteria and viruses.[/FONT]
source: [/FONT]https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html
under the heading “what is an n95 filtering facepiece respirator?”
I suspect the confusion is in the terminology. Notice on that webpage the definitions for respirator and facemask. What people are calling a n95 “facemask” is really a “respirator”, so long as it is worn properly (not loose w. Air gaps)
more useful info :
https://www.cdc.gov/niosh/npptl/pdfs/UnderstandDifferenceInfographic-508.pdf
-rvb