Do you know the infectious concentration of SARS CoV 2 in inhaled air necessary to initiate an infection?
Do you think that the achieved concentration is more, the same, or less after passing through two masks (source and target)?
“Observations during SARS suggested double-masking and other practices increased the risk of infection”
about halfway down:
https://aapsonline.org/mask-facts/
The NY Times suggests masks should have a tented design:
https://www.nytimes.com/interactive/2020/10/30/science/wear-mask-covid-particles-ul.html
[That article caused my PC to go into thermal hibernation.]
I didn’t know there was going to be a quiz, Noble.