Breaking the back of polio” < Yale School of Medicine
What to Know About Polio: Vaccines, Symptoms and How It Spreads - The New York Times
Eradication and Control Programs A Look At Polio
Poliovirus - MEpedia
Wiping Out Polio: How The U.S. Snuffed Out A Killer : Shots - Health News : NPR
Poliovirus - an overview | ScienceDirect Topics
The Basic Biology and Transmission of Poliomyelitis
How Does Poliovirus or Enterovirus Spread, Know its Risk factors & Treatment
Polio - Wikipedia
Poliomyelitis (Poliovirus) - YouTube
Pak Fights Polio on Twitter: "Do you know how #polio virus spreads?Polio is a highly contagious disease that can spread easily from person 2 person. RT to spread the msg https://t.co/oP3bKjyHjl" /
Polio: History, Causes, Diagnosis, Treatment and More
Polio: What is it and how does it spread? - BBC News
The international spread of Poliovirus, 2013. | Download Scientific Diagram