Bacteria are the smallest living organisms known to exist.
Bacteria can come in all sorts of shapes and sizes.
Not all kinds of bacteria will cause disease. In fact there is some good bacteria in your digestive system.
Cows use bacteria to digest the grass they eat.
Bacteria can be found everywhere.
The best way to protect yourself against dangerous bacteria is to wash your hands.
You can prevent bad bacteria from spreading by covering your mouth when you sneeze.
Vitamins will help you fight bad bacteria, so you need to eat a lot of fruits and vegetables.