That is not how it works. The claimant has to prove. I can prove mine.I can say I m god, can you disprove it?
Face mask filters—textile, surgical, or respiratory—are widely used in an effort to limit the spread of airborne viral infections. Our understanding of the droplet dynamics around a face mask filter, including the droplet containment and ...
The main mechanisms of filtering through masks are droplets diffusion, interception, and impaction. During continued or cyclic coughing, the flow will increase and will adversely affect the mask filter efficiency. A wide range of filter efficiencies has been reported.11–15 The leakage of droplets out of the mask is also an essential factor that needs to be statistically quantified. Previous studies report limited effectiveness in using surgical masks to reduce respiratory illness,16–18 and clinical trials report little effect on infection rates with and without surgical masks.19,20 In contrast, laboratory studies concerning coughing and infectious subjects showed that surgical masks are effective at reducing the emission of large droplets21,22 and minimizing the lateral dispersion of droplets. However, they allowed simultaneous displacement of aerosol emission upward and downward from the mask.4 Several randomized trials have not found statistical differences in the effectiveness of surgical masks vs N95 filtering face-piece respirators (FFRs) at reducing respiratory diseases for healthcare workers.
See the highlighted? Basically, even with surgical quality mask, there would be still enough particle dispersal to make contact with another body and/or structure if close enough in proximity. It is not that hard to use keywords search to verify or challenge my statement about mask, or the uselessness of it in public environment. That you made such a flaw in logic says much about your technical understanding of any issue.