‘masks’ is about as vague as ‘food’ There are good and bad masks, just as there is good and bad food. A cloth mask will not protect you against an aerosol (note: am a researcher who has seen the electron microscopy images proving this), that is why N95s are mandated with no beards in any ISO work environment where you are subjected to aerosol risk. The inability of public dialog on this nuance is just a reflection of…
- Available
- Cheap
- Plentiful
- Comfortable
Without a conversation, it's impossible to get people to wear them.
As a footnote, COVID19 spreads through both large droplets and aerosol, and infection is highly dependent on initial viral load. Eliminating large droplets is helpful, especially on the way out.