And sorry masks do work in the prevention of getting this airborne virus in closed in places with lots of virus in the air.
They are not totally fullproof. You ARE STILL full of . Of course you can still get the virus and accompanying symptoms by sitting in a car with people who are infected and giving off large viral loads over a long period time.
The masks absolutely work in mitigating and PREVENTING under short term exposure smaller viral loads WHICH IS WHAT ONE would typically get in the settings they are asked to be used for. STores, shorter airplane flights, airports...
One viral particle is much smaller that almost any filter could handle. But millions of airborne viruses in a droplet of water are absolutely going to find it very difficult to get through a mask. And thats how these viruses are spread, NOT one particle at a time. Millions in droplets.