And he didn’t know they wear masks in operating rooms continuously, during sometimes hours long operations?
Give the guy a push broom for his new job cleaning offices.
We are an arrogant species, believing our fantasy based "facts" are better than the other person's fake facts.
The older we get, the less "Life in Prison" is a deterrent.
Always wear a proper mask when out and about. The life you save could be both yours and mine.
Don't forget that the S in IoT stands for Security.