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1 gen 2000 anni - 550 million children get OPV. China/Australia declared polio-free.

Descrizione:

A record 550 million children – almost 10% of the world's population – receive the oral polio vaccine. The Western Pacific region, spanning from Australia to China, is declared polio-free.

Aggiunto al nastro di tempo:

Polio Timeline

ByTyler Heald
19 nov 2023
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0
249

Data:

1 gen 2000 anni
Adesso
~ 25 years ago
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