Look at the picture scale, coronga and cilliated cells

https://imgur.com/a/jBP4b7t

ANY "droplet" >20 micra that touch "cloth" masks EVAPORATE in minutes, leaving virions behind in the mask surfaces (outside, and inside for the infected)
Accumulation

AND Sub 20 micra droplets CROSS "cloth" / surgical masks easily

It needs only one virion to infect you, easily inhalated or exhalated

The ONLY (partially) useful masks are N95.
ANY other tupe is CRAP for it, besides also accumulating bacteria and fungus as is kept wet & warm by respiration and they proliferate / concentrated

Mere DIRTY mosquitoes fences

The SOLE goal of desgovernors who enforce this is harming public health in the mean time

[link to www.sci-news.com]