Everywhere you go, everything you touch, you are surrounded by microscopic germs. They bounce off your arm when you scratch, they fly off your hand when you wave to a friend, they spew out your mouth when you talk. Even when you sit around doing nothing, like watching this video... you're sitting in your own, personal germ bubble.

Originally released by American Institute of Physics, 2016. Streaming video file encoded with permission for digital streaming by Infobase on September 20, 2016.