The coronavirus has a diameter of roughly 125nm, air is primarily made up of nitrogen and oxygen. Oxygen (the important stuff) has a bond length of 121pm, so let's say the rough diameter of the 0_2 molecule is about 400pm to be safe. Hence a coronavirus particle has a diameter that's over 312 times that of a molecule of oxygen gas.
A bit like comparing a grain of salt to a baseball when scaled up.
What kind of thread-count do you need to stop 125nm?
I am aware that the virus tends to cling to globs of mucus or spittle which will be stopped by a simple cloth mask, or even a bandana.
They work via electrostatic charges. Stop talking about things you know nothing about as though no one else does either. This is why people are still getting sick.
Just to remind everyone, a virus is so small that air would be unable to pass through anything that would stop it.