Masks are in short supply and should be used sparingly. Mask should not be worn just randomly and by just about anybody. Just two situation calls for wearing a mask.
When you are sick then wear face mask when around other people. (example sharing a room or in a vehicle) and when entering a healthcare provider’s office. If unable to wear mask due to issue breathing then do your best to cover coughs and sneezes, and people who are caring for you should wear a mask when they enter your room.
If you are not sick you do not need to wear a face mask unless you are caring for someone who is sick and they are unable to wear a face mask.
Now when you DO need to wear a face mask make sure they are N95 Respirator type and not the typical surgical mask type. The N95 type filters out 95% of airborne particles.
N95 Respirator Mask
Another example of N95 mask