Across
- 8. System that removes dead blood cells, cancer cells, and pathogens
- 10. Rubeola
- 11. German measles
- 12. Organ that breaks down and removes old, damaged blood cells
- 13. Lockjaw
Down
- 1. Contagious airborne infection caused by varicella-zoster virus
- 2. AIDS drug
- 3. Influenza vaccine
- 4. Eradicated worldwide in 1980
- 5. Gland that promotes development of T-cells
- 6. infection caused by human immunodeficiency virus
- 7. Type of immunity that lasts several years
- 9. Type of immunity that is temporary