Immune System

The people usually get sick from the germs, which are bacteria, viruses, worm......
The way that the germs work is by getting into the body and infecting cells, which can kill the cells and we get more sick.
The mos common illnesses are the flu, cold, and food poisoning.
The people usually get sick from eating bad food, from other people, dirty surfaces, but out immune system protects us from germs.
the first defenses that we have are:

• Skin - Keeps germ from gething inside body

Stomach acid - Kill bacteria on your food.

we also have specific defenses and those are the white blood cell that travel around the body and eat at the germs.