Sara, a 10-year-old at al Thawra hospital in Hodeidah, Yemen, is half paralyzed by diphtheria, an illness that can be prevented by vaccination. She subsequently had to leave the hospital because of the violence.
Russian children clamor for food, circa 1941. During World War II, the Nazis sought to implement a "hunger plan" to starve millions from Russia and Eastern Europe.
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Acutely malnourished child Sacdiyo Mohamed, 9 months old, is treated at Banadir hospital in Somalia on Saturday. Somalia's government has declared the drought there a national disaster.
Mohamed Sheikh Nor/AP
A 5-year-old child cries as a nurse struggles to find a vein for an injection at a health clinic last month in Shada, Somalia. The child's family lost all their animals to drought and traveled more than 100 miles in search of a better situation.
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Lucia Adeng Wek holds her 3-year-old son, Wek Wol Wek, who suffers from malnutrition. They're at a clinic in South Sudan run by Doctors without Borders and were photographed on October 11, 2016.
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A World Food Program food distribution site in Bentiu, South Sudan. The U.N. says nearly 5 million people in the country do not have enough food, and in one region people are already dying of starvation.
Drought in Somalia has severely affected livestock for local herdsmen, as well as farmers' crops. The U.N. says action is needed to prevent famine in the region.
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A hamlet between the towns of Tsihombe and Ambovombe, in the most drought-stricken area in southern Madagascar. Most families in the region have resorted to eating wild fruits and tree leaves.
Courtesy of Jeanluc Siblot
Visitors check out the Soviet-era metro cars exhibited at the Partizanskaya subway station in Moscow, as part of festivities marking the subway system's 80th anniversary.