child mortality
A girl carries a child in the outskirts of Lilongwe, the capital of Malawi. That's one of the countries in sub-Saharan Africa that has made good progress in reducing child mortality. Aris Messinis/AFP/Getty Images hide caption
China is one of the countries where childhood mortality is dropping. Above, students practice martial arts. ChinaFotoPress via Getty Images hide caption
A newborn in Sierra Leone is treated after delivery by Caesarean section. The country's child mortality rate has dropped from 264 per 1,000 in 1990 to an estimated 120 this year. Lam Yik Fei/Getty Images hide caption