Peter Piot was one of the co-discoverers of the Ebola virus in 1976. "I never thought we would see such a devastating and vast epidemic," he says. Leon Neal/AFP/Getty Images hide caption

itoggle caption Leon Neal/AFP/Getty Images

The orchids that produce vanilla beans have no natural pollinators in Madagascar; the plant must be pollinated by hand — a labor-intensive process with little margin for error. Courtesy of Madécasse hide caption

itoggle caption Courtesy of Madécasse

A team of body collectors carry the corpse of a woman suspected of dying of Ebola in Monrovia, Liberia's capital. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Shops are closed in Monrovia's West Point neighborhood as part of a quarantine to contain the spread of Ebola. Zoom Dosso/AFP/Getty Images hide caption

itoggle caption Zoom Dosso/AFP/Getty Images

Islamist fighters in the Libya Dawn coalition guard the entrance of the Tripoli International Airport on Sunday. After days of battles, they captured it from forces aligned with rogue general Khalifa Hifter. Mahmud Turkia/AFP/Getty Images hide caption

itoggle caption Mahmud Turkia/AFP/Getty Images

President Ellen Johnson Sirleaf apologizes to Eva Kamara, the mother of a boy who was shot by Liberian security forces last week and later died. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

An airplane damaged by shelling at Tripoli International Airport on Saturday. Unidentified warplanes attacked targets in Libya's capital, Tripoli, on Sunday, residents said, hours after forces from the city of Misrata said they had seized the main airport. Reuters/Landov hide caption

itoggle caption Reuters/Landov

An ActionAid worker delivers basic goods to Amanda Ellis, whose mango business has crashed since five members of her family died of Ebola. She says that she has been abandoned by her friends. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR