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Polio cases drop by 99.9% - WHO
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US reports first polio case in nearly a decade | Health News | Al Jazeera
Progress Toward Polio Eradication — Worldwide, January 2018–March 2020 | MMWR
Polio Case in New York State Is First for US Since 2013 - Bloomberg
The world just took a step closer to eradicating polio | World Economic Forum
Polio-like illness AFM: 11 confirmed cases in eight states so far in 2019 | CNN
Chart: The Long Road to Global Wild Polio Eradication | Statista
Africa is on track to be declared polio-free | The Economist
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Polio Cases Surge in Pakistan and Afghanistan - The New York Times
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Wiping Out Polio: How The U.S. Snuffed Out A Killer : Shots - Health News : NPR
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Polio: Two out of three strains 'eradicated' – DW – 10/24/2019
Pakistan reports polio case to take year's count to 13 | Reuters
Polio cases derived from new oral vaccine reported for first time
