If you’re not infected you can’t transmit a virus. Protecting yourself is an individuals first priority.
Our EMS educator admitted years ago that even the expensive N95 masks we wore and had to be fit tested with twice a year... didn’t offer much protection against just about anything. The masks were more of a feel-good measure. But these ornamental pieces of fabric and surgical style dust masks are a complete joke. They don’t do anything other than make people feel like they have some protection.