Editorial: Just one case of polio is a global threat

Wiping Out Polio: How The U.S. Snuffed Out A Killer : Shots - Health News : NPR

Polio Vaccination Causes More Infections than Wild Virus

Indonesia reports more vaccine-derived polio cases

India, Southeast Asia to Mark Five Years of Being Polio-free

Polio is back in the United States. How did that happen? - Bulletin of the Atomic Scientists

Chart: How Vaccines Helped All But Eradicate Diseases

Who created the polio vaccine?

Polio in New York – an infectious disease doctor explains this exceedingly rare occurrence

How Polio Crept Back Into the U.S. — ProPublica