A unidentified family member (right) of a 10-year-old boy that contracted Ebola has her temperature measured by a health worker outside an Ebola clinic on the outskirts of Monrovia, Liberia, on Nov. 20. Liberia, Guinea and Sierra Leone have now gone 42 days without a single reported case of Ebola. Abbas Dulleh /AP hide caption

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Guinea is where the Ebola outbreak started in West Africa. In this photo from November 2014, workers from the local Red Cross prepare to bury people who died of the virus. Kenzo Tribouillard /AFP/Getty Images hide caption

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5 Mysteries About Ebola: From Bats To Eyeballs To Blood
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Liberian workers dismantle shelters in an Ebola treatment center in the Paynes Ville neighborhood of Monrovia. Doctors Without Borders closed the center last month because it was no longer needed. Zoom Dosso/AFP/Getty Images hide caption

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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

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As Ebola Crisis Ebbs, Aid Agencies Turn To Building Up Health Systems
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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

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Boko Haram Takes A Page From ISIS Propaganda Playbook
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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

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The Grandpa Who Saved His Granddaughter From Ebola
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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

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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

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Ebola was out of control in Liberia in August, when this picture was taken. Dominique Faget/AFP/Getty Images hide caption

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14 Takeaways From The 14-Part WHO Report On Ebola
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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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Rev. John Harmon preaches at Trinity Episcopal Church in Washington, D.C. Courtesy of Rod Lewis hide caption

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How Ebola Took A Toll On One American Church
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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

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U.N.'s Anthony Banbury: Zero Cases Of Ebola Is The Only Option
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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

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Dr. Kent Brantly: Lessons Learned From Fighting Ebola
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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

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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

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