| A | B |
|---|
| disese | an illness that keeps the body from working well |
| immune system | all the body parts that fight disease |
| virus | a particle that multiplies inside a living cell |
| antibody | a chemical made by the immune system |
| immunity | when your body has the ability to protect itself or fight disease caused by germs |
| communicable | a disease that can spread |
| bacteria | certain kinds of one-celled living things |
| vaccine | something the doctor gives you to form antibodies against a disease |
| symptom | a sign of a disease |
| germs | particles that cause disease |
