Girls carry containers of water filled from the local communal tap Zimbabwe, which is in the grip of a nationwide drought that has been linked to climate change. The government has appealed for $464 million in aid to stave off famine.

A sweeping study in The Lancet finds that longstanding progress in treating diseases and reducing childhood deaths is in jeopardy.

(Image credit: Cynthia R. Matonhodze/Bloomberg/Getty Images)