Related Clues:
- Polio vaccine developer
- See 7-Down
- Kind of vaccine
- Oral vaccine developer
- Polio scientist
- Scientist who won a 1977 Presidential Medal of Freedom
- Vaccine developer Jonas
- Vaccine developer
- Sabin's rival
- Polio fighter
- Polio vaccine discoverer
- Inoculation innovator
- Polio conqueror
- Polio immunologist Jonas
- Polio vaccine pioneer