Russia, Africa, the Americas, parts of South Asia and a few countries in Europe are among the regions being monitored.
Russia, Africa, the Americas, parts of South Asia and a few countries in Europe are among the regions being monitored.
[WHO-AFRO] Brazzaville -- An estimated 51.2 million lives have been saved through vaccines in the African region over the past 50..
The World Health Organization has approved a new version of a widely used cholera vaccine that could help address a surge in cases..