they don't. common sense says so. if you can breathe air through the mask, you can inhale virus particles. Fuck this asinine talk about "droplets" that's irrelevant
Yes, try sealing the mask tightly just over your nostrils, isolating just your nostrils and try and breath - within seconds you'll realize that if the mask were 100% sealed, YOU COULDN'T BREATH! Also try isolating just your mouth - same thing happens!
they don't. common sense says so. if you can breathe air through the mask, you can inhale virus particles. Fuck this asinine talk about "droplets" that's irrelevant
Yes, try sealing the mask tightly just over your nostrils, isolating just your nostrils and try and breath - within seconds you'll realize that if the mask were 100% sealed, YOU COULDN'T BREATH! Also try isolating just your mouth - same thing happens!