Thứ Ba, 25 tháng 8, 2020

NPR News: Africa Declares Wild Polio Is Wiped Out — Yet It Persists In Vaccine-Derived Cases

Africa Declares Wild Polio Is Wiped Out — Yet It Persists In Vaccine-Derived Cases
The Kick Polio Out Of Africa Campaign began in 1996. This week, the World Health Organization announced that wild polio had been eradicated — although there is a caveat.

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August 26, 2020 at 02:42AM
Children's Health

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