polio - Polio through history | Britannica
How Good Is the Polio Vaccine? - The Atlantic
Dr. Jonas Salk Announces Polio Vaccine - HISTORY
History of polio - BBC News
Medical Advancement: Discovery of Polio Vaccine
Lessons from how the polio vaccine went from the lab to the public that Americans can learn from today
UKHSA detects polio virus in London sewage, declares national incident
History of polio - BBC News
Should you worry about the first U.S. polio case in nearly a decade : NPR
The Discovery of the Polio Vaccine - ABDO
Polio case confirmed in New York state, health-care providers told to look for more
What to know about the polio vaccine and why most people aren't at risk of infection - ABC News
Polio | History of Vaccines
History of polio - BBC News
The Development of the Polio Vaccine - The official blog of Newspapers.com
History of polio - Wikipedia
Polio Was Almost Eradicated. This Year It Staged a Comeback. - The New York Times
History of polio - Wikipedia
History of Polio – GPEI
Tainted Cutter polio vaccine killed and paralyzed children in 1955 - The Washington Post
History of polio - BBC News
History of Polio – GPEI
When Polio Triggered Fear Among Parents in the Post-World War II Era - HISTORY
History of Polio – GPEI
Polio Has Been Detected in New York City Wastewater, Officials Say - The New York Times
