Across
- 6. A disease that can be passed from one person to another
- 7. To protect against disease by receiving a vaccine
- 8. Medicines used to treat bacterial infections
- 9. Illness caused by a virus or bacteria
Down
- 1. The study of diseases and how they affect living things
- 2. Tiny organisms that can cause disease (plural)
- 3. The spread of disease from one person to another
- 4. A substance that helps the body fight diseases by creating immunity
- 5. The body's natural defence system against disease