Last seen in:
- Thomas Joseph - King Feature Syndicate - Aug 6 2012
- Thomas Joseph - King Feature Syndicate - Jan 14 2012
- Newsday.com - Dec 14 2011
- L.A. Times Daily - Jan 19 2010
- Premier Sunday - King Feature Syndicate - Dec 27 2009
- L.A. Times Daily - Oct 6 2009
- L.A. Times Daily - Apr 15 2009
- Premier Sunday - King Feature Syndicate - Nov 2 2008
- New York Times - Apr 30 2007
- New York Times - Oct 18 2006
Related Clues:
- 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
- Famed polio fighter