Across
- 2. mild viral disease of cows
- 3. developed oral polio vaccine
- 4. inoculated with cowpox
- 6. disease-fighting cells
- 10. body's fighting system
- 11. developed first polio vaccine
- 14. disease-fighting proteins
Down
- 1. causes paralysis
- 3. short name for inoculation
- 5. caused by animal bite
- 7. lung breathes for people
- 8. deadly blisters
- 9. helps body develop immunity
- 12. virus used in oral polio vaccine
- 13. virus used in Salk vaccine