beorhthelm
A. Virgo, Football Genius
- Jul 21, 2003
- 35,772
Masks are worn to protect others from you.
Why do you think vets wear them when operating on animals? Doctors wore them long before this pandemic started, as did nurses. They are worn to prevent their droplets falling on you.
of course medical grade masks properly worn protect you. a couple of layers of material give some protection, maybe 70-80%. which means if you are near anyone for a period of time very little protection. this is months old, based on WHO view and years of research available.