Light shines through the chlorine-stained windows in the blood-testing area at Redemption Hospital in New Kru Town, Monrovia, Liberia. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

The most recent propaganda videos from Boko Haram have higher production values than in the past and other similarities to ISIS-produced videos. Boko Haram/Sendvid hide caption

itoggle caption Boko Haram/Sendvid

A health worker with Doctors Without Borders carries a child suspected of having Ebola at the treatment center in Paynesville, Liberia, last October. Ebola is especially deadly for young children and babies. About 4 in 5 infected died. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images

Nick van Praag of Ground Truth meets with locals of Pakistan's Sindh Province in 2013 to see if they're satisfied with efforts to help them recover from previous floods and prevent damage from any future ones. Kai Hopkins/Ground Truth hide caption

itoggle caption Kai Hopkins/Ground Truth

French President Francois Hollande gestures as he delivers a speech to foreign ambassadors during a ceremony to extend New Year wishes at the Elysee Palace in Paris on Friday. Jacques Brinon/AP hide caption

itoggle caption Jacques Brinon/AP

This photo was taken in November, a tough month for Sierra Leone, with Ebola cases reportedly on the rise. A staff member is disinfecting an office where Dr. Komba Songu M'Briwah talks on the phone. David Gilkey/NPR hide caption

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Anthony Banbury (second from left) just completed his final tour of West Africa before stepping down as the head of U.N.'s Ebola mission. Reuters/Landov hide caption

itoggle caption Reuters/Landov

Dr. Kent Brantly speaks about the world's response to Ebola during the Overseas Security Advisory Council's Annual Briefing in Washington, D.C. last month. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images

Dr. Thomas Frieden, director of the U.S. Centers for Disease Control and Prevention, talks with Doctors Without Borders staff during a visit in August to an Ebola treatment center in Monrovia, Liberia. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Among the dilemmas that arise when health workers are in their protective garb: What if you can't find the person assigned to be your Ebola Treatment Unit partner? John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR