universal mask wearing. The virus needs to get into your lungs- so mouth or nose. The only other way to get in is in your eyes- so add goggle or eye shields

anybody who has ever seen the light shine in such a way to see all the dust / skin cells being shed off a human being on a regular basis should understand that is a skin cell can be airborne, then a viral cell can be airborne for an extended period. we have all seen how much spittle is expelled when people speak

Viruses are about a thousand times smaller than bacteria, and bacteria are much smaller than most human cells. Viruses are so small that most cannot be seen with a light microscope, but must be observed with an electron microscope.