"But the bottom line here is that almost all of these masks cut down droplet spread by 80% or more
That is huge.
Simple version: If we all wore effective masks and wore them well, then the reproductive number could fall from 2.5 to less than 1.0, and outbreak would extinguish"
https://twitter.com/Farzad_MD/status/1292560856157388800
tl;dr^2
"But the bottom line here is that almost all of these masks cut down droplet spread by 80% or more
That is huge.
Simple version: If we all wore effective masks and wore them well, then the reproductive number could fall from 2.5 to less than 1.0, and outbreak would extinguish"