There are a lot of things we think we know about those germs all around us, but only some of that stuff is true.
We've got a handy crash course in hygiene fact and fiction for you.
Mental Floss made this entertaining video that somehow still manages to clear up misconceptions about staying clean and germ-free. Scroll down if you want to get right to it.
3. Viruses stay alive on hard surfaces a long time. (1:05)
Well, what's a long time? Depends on the germ. But even the cold virus can't get you after 24 hours.