Good news: new figures show that more children are reaching their fifth birthday than ever before. The total number of under-five child deaths has nearly halved since 1990.
These photos look at what's made the difference, and the challenges that remain.
Protecting children from infectious diseases like measles has been a big part of reducing child deaths. These mums in Burundi are waiting to register their children for vaccination in their local health centre. In Burundi, we provide the government with all routine vaccines for children under one, as well as regular boosters and emergency campaigns against measles outbreaks.
© UNICEF/BRDA2011-00042/Pawel Krzysiek