Across
- 4. create antibodies
- 8. COVID-19.Influenza,HIV, and Meningitis
- 11. outside defense system
- 12. capable of engulfing and absorbing bacteria
- 14. reproductive cycle
- 16. to destroy disease-causing organisms
- 18. naturally exist
- 19. the immune system
- 20. antibodies
Down
- 1. method by which a virus can replicate its DNA
- 2. vaccinations
- 3. when bacteria change in response to the use of these medicines
- 5. acquired immune response
- 6. fight infections caused by bacteria
- 7. protection from a specific disease
- 9. protects the body from outside invaders.
- 10. protect the body from infection and may help fight cancer.
- 13. vaccine-induced immunity
- 15. leukocyte
- 17. white blood cells