Not literally nothing. Some people will deliberately cough in your face, but most people will give you a little more personal space. Rule of thumb: if you can

Not literally nothing. Some people will deliberately cough in your face, but most people will give you a little more personal space. Rule of thumb: if you can smell what's around you – or what was around you 5 seconds ago – you're not protected from airborne biohazardous material. That said, there are masks that do protect you.