There are none.
Masks worn by HEALTHCARE WORKERS can stop their BACTERIA from entering wounds/openings of patients and causing serious, uncontrollable infections. BACTERIA are not VIRUSES.
So, when they say "Masks work." --- they are not giving you the full story.
P.S. The "6-foot Social Distancing" measurement ... a total fabrication. There is NO science proving/disproving this tactic will stop the "spread" of COVID-19 virus.
"ORANGE MAN BAD" has made us collectively, clinically insane.
“This is all very simple: Just demand to see the peer-reviewed documents that prove any the ‘approved’ masks people have worn for the past two years can stop the specific sized virus knows as COVID-19, measured at only ONE μm ...”
Covid-19 does not fly around on its own, it needs to be carried by a particle, the minimum size of which has been calculated to be 9.6 μm.
N95 masks stop 95% of particles that are 0.3 μm or larger. That’s the definition of N95. They will stop even higher percentages of larger particles. As I mentioned earlier, the quality of the mask matters, but even a cloth mask stops some of the particles, and something is better than nothing, since your likelihood of contracting *any* disease depends largely on the level of exposure and the load you’re carrying.