Possible Clues:

• Virus once treated with an iron lung
• Dr. Sabin studied it
• Sabin developed a vaccine for it
• Disabling disease
• Infectious disease of the nervous system
• Disease largely eradicated by Salk's vaccine
• FDR's condition
• Target of a 1950s vaccine
• Albert Sabin developed a vaccine for it
• Viral infection from India caught by 13th-century explorer