Flat Earth Syndrome... You know what you know...Masks that doctors wear prevent large droplets of bodily fluids that may contain viruses or other germs from escaping via the nose and mouth. These masks are specific for their job and are changed often. The mask can't stop a virus transmitted through normal breathing.
Mask mandated by local gov'ts and stores are not uniform and therefore illustrate that it is more of a panacea than a deterrence from infection. I have seen bandanas used as well as people wearing masks under their nose. Masks inhibit oxygen flow and trap germs and do more damage to a person than helping.
I'll chance a 99.9xx% survival rate all day long than restrict my personal freedoms.