Face masks are flawed.
Neiburger
E J
EJ
University of Illinois College of Dentistry, Chicago.
Perry
R P
RP
D003140:Communicable Disease Control / Q000379:methods*; D004868:Equipment Failure; D005374:Filtration; D006801:Humans; D008397:Masks / Q000592:standards*; D010316:Particle Size; D014780:Viruses