@pinkelephant@infosec.exchange
Masks do impact the amount of viral particles you are exposed to.
https://www.theguardian.com/world/2020/mar/27/can-a-face-mask-protect-me-from-coronavirus-covid-19-myths-busted

Whether they reduce it enough to impact whether you receive an infection dose and whether that infectious dose size relates to severity of symptoms it doesn't seem clear.

This is an interest read...

https://www.newscientist.com/article/2238819-does-a-high-viral-load-or-infectious-dose-make-covid-19-worse/#

If you are in a country with a shortage, don't buy them unless you're in a higher risk category.
Otherwise, it doesn't hurt to use one, it may help