Grass pollen size is 25 micrometers
Coronavirus size 0.1 micrometers
Pollen 250 times bigger.
Masks don’t work for hay fever
https://m.primal.net/HmQn.jpg
yep. and they sure as shit don't work for covid. Yet, the CDC and the WHO are still pushing masks despite tons of scientific evidence they don't work. Politicians have killed science