1 janv. 2000 - 550 million children get OPV. China/Australia declared polio-free.
Description:
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.Ajouté au bande de temps:
Date:
1 janv. 2000
Maintenaint
~ Il y a 25 ans