Depends on the mask. N95 protects you pretty well.

It is true that most masks were build initially to prevent airborne transmissions from wearer to others, typically patients in a surgical setting. However studies have later shown that protection works both way.

> Masks don’t keep you from getting COVID. They only help prevent you from spreading it.

???

Most masks don't have a one-way valve that only filters your exhalation, leaving inhaled air unfiltered. Any given mask is going to be roughly as good at filtering incoming air as it is at filtering outgoing air.

Both. To some extent.