Omu Fahnbulleh stands over her husband after he staggered and fell, knocking him unconscious at an Ebola ward in Liberia in 2014. John Moore/Getty Images hide caption

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Mutant Ebola May Have Caused Explosive Outbreak

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The mystery disease in South Sudan has not been identified but is known to cause fever and unexplained bleeding. Above: an image of another hemorrhagic fever, Marburg virus, made with an electron microscope and then colorized. BSIP/UIG/Getty Images hide caption

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BSIP/UIG/Getty Images

Margaret Chan (left), director general of the World Health Organization, is among the dignitaries visiting a military base in Conakry, Guinea, on a tour of west African countries affected by Ebola. Also pictured: Guinean President Alpha Conde (fourth from right) and U.N. Secretary General Ban Ki-Moon (right). BINANI/AFP/Getty Images hide caption

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BINANI/AFP/Getty Images

WHO Aims To Reform Itself But Health Experts Aren't Yet Impressed

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Scientists Say It's Time To End 'Parachute Research'

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Mamuedeh Kanneh (right) was married to the man who brought Ebola to Barkedu, Liberia, a village of about 6,000. He died of the virus. She now cares for her children as well as children who lost their parents to the disease. John W. Poole/NPR hide caption

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John W. Poole/NPR

The multimammate mouse can transmit Lassa virus to humans. The virus is likely spread when the rodent urinates or defecates on grain supplies. US National Library of Medicine, National Institutes of Health hide caption

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US National Library of Medicine, National Institutes of Health

Garmai Sumo is a nurse featured in the documentary, Body Team 12. In one scene, she shares her religious views: "When they die, the righteous will resurrect on the day of the trumpet. But everyone remain in their grave for now." Body Team 12 hide caption

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Body Team 12

A corpse has tested positive for the Ebola virus in Sierra Leone, a day after world health officials declared West Africa free of the disease. On Friday, people pass a banner reading "STOP EBOLA" — part of Sierra Leone's health campaign — in the city of Freetown. Aurelie Marrier d'Unienville/AP hide caption

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Aurelie Marrier d'Unienville/AP

An optometrist confronts the killers responsible for his brother's death during the 1965 Indonesian genocide in The Look of Silence. Courtesy Drafthouse Films and Participant Media. hide caption

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Courtesy Drafthouse Films and Participant Media.

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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Abbas Dulleh /AP

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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Kenzo Tribouillard /AFP/Getty Images

5 Mysteries About Ebola: From Bats To Eyeballs To Blood

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