Across
- 1. asthma,
- 4. exposure, protecting
- 7. antibody
- 9. illness, germs
- 11. Carrier, tick, mosquito
- 13. defenses system
- 17. growth of germs
- 20. antibodies, produce own immune syst.
Down
- 2. the cause of diseases
- 3. immune system to respond, rapidly
- 5. immune system,develop from stem cells
- 6. how body recognizes & defends from bacteria
- 8. infectious diseases touches or exchange body fluids
- 10. multiplies
- 12. the worldspread of new diseases
- 14. small population
- 15. produce protection from a specific diseases
- 16. preventing diseases,prolonging life
- 18. Volleyball, cricket, tennis
- 19. covid