Why some vaccinated people can still spread polio | CNN
Polio case confirmed in New York state, health-care providers told to look for more
Africa declared free from wild polio — but vaccine-derived strains remain
Wiping Out Polio: How The U.S. Snuffed Out A Killer : Shots - Health News : NPR
Polio Elimination in the United States
Infographic on Polio Around The World
Can polio make a comeback in India too? | India News - Times of India
Wild Polio Continues Paralyzing Children in Pakistan — Vax Before Travel
Polio - Our World in Data
Polio Was Almost Eradicated. This Year It Staged a Comeback. - The New York Times
Polio: Virus, Causes, Symptoms, Transmission & Treatment
History of polio - BBC News
History of polio - BBC News
Polio vaccination: past, present and future | Future Microbiology
Wiping Out Polio: How The U.S. Snuffed Out A Killer : Shots - Health News : NPR
Africa declared free of wild polio in 'milestone' - BBC News
Polio
Global Polio - Alert - Level 2, Practice Enhanced Precautions - Travel Health Notices | Travelers' Health | CDC
New Polio Cases Confirmed in Five Countries — Precision Vaccinations
The Fate of Polio: Eradication or Elimination? | KQED
History of polio - BBC News
The Eradication of Polio — Progress and Challenges | NEJM
