Across
- 2. Injecting vaccines into organisms so they can build up a resistance to pathogens
- 4. The study of the immune system
- 7. The body's reaction to foreign invading substances
- 8. A generalized response to invading substances that is present at birth
- 9. When the immune system attacks its own body
- 11. A weakened infectious agent
Down
- 1. The capability of an organism's body to fight off pathogens
- 3. A scientist who studies the immune system
- 5. A "learned" response to invading substances that is developed over time
- 6. A single celled infectious agent that invades a host body, damaging tissue or releasing toxins
- 10. This is something that infects living things and causes illnesses
- 11. An infectious agent that invades a host cell, uses it to reproduce, and eventually kills multiple host cells