You might benefit from a more robust understanding of filtration mechanisms and updating your mental model of airborn covid to include the medium in which it's broadcast. Folks aren't outgassing raw virii with no associated droplet material, so your particle size is off. Additionally N95 can absolutely filter particulate well below the rated 0.3 microns, it's just less effective at doing so. Summary: masks absolutely filter airborn covid when rated material is used with correct fitment.
I don't think that matters. We exhale so much moisture that cloth masks are saturated in 10-15 minutes, and after that the air pressure just recreates the droplets as it goes through the mask, spreading it from the outside.
Lol what. You do understand that van der Waals force is a significant driver of filtration at this scale yes? We're not talking about corralling coffee grounds here.
