Say you got a N95 mask, so you got the best mask. A N95 mask blocks up to 0.3 microns, a virus is 1 nanometer, there are 1000 nanometers in a micron. Not to mention all those masks do not seal air tight and leak under pressure. But they will protect me from you, that’s BS. How do I know? 14 years working in hazardous waste and superfund site cleanups.