So we should wear masks

[alloutoffucks]

Initially we were told that masks were a waste of time. Now we are told that masks do provide some benefit.

Yes, CDC now recommending all Americans wear masks in public settings

www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover.html

I understood that the type of masks they are saying the public should wear do not stop droplets entering but may stope some escaping. I don't understand why it only works in one direction. If infected droplets can enter, would that not mean you are raising your own risk by wearing a mask...as the droplets will become trapped in a moist area right by your nose and mouth? I assume I must be wrong there, but can anyone explain?