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The Sciences
Health
Environment
Aerospace
Education
The Sciences
Health
Environment
Aerospace
Education
vaccine-derived polio
The Problem With Declaring Africa To Be Free of Wild Polio
Africa Declared Free of Wild Polio, Four Years After Last Case
Explainer: How Bad Is the ‘Polio Vaccine Contamination’ Controversy?
Syrian Polio Outbreak Setback for Global Eradication Efforts
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