Some people think spreading germs is as simple as brushing your teeth.
But spreading gerMS is much more complex, and it can be hard to get right.
It can be easier to get germs into a room, if you have an enclosed space, or into your mouth.
But there are ways to spread the disease more easily and easily, according to a new study from the Centers for Disease Control and Prevention.
It is the first time we know how to spread these diseases through a single-celled organism.