Your body has a number of ways of defending itself against germs.
1. Lungs and air passages produce - this traps the dust and germs. Tiny hairs called waft the mucus up to your throat where it is swallowed.
2. Cut - if you get a cut, your body quickly produces a over the wound, This helps to prevent germs getting into your blood through the wound.
3. Eyes - the tears in your eyes contain which kills germs
4. Stomach - your stomach produces - as well as being needed for digestion of your food, the acid kills germs.
5. Skin - your skins has that prevent germs growing on it - it is also a barrier to germs.