A baby born with microcephaly in Brazil is examined by a neurologist. Felipe Dana/AP hide caption

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Zika Is Linked To Microcephaly, Health Agencies Confirm

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Health workers fumigate to wipe out mosquitoes in Recife, Brazil. Mario Tama/Getty Images hide caption

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WHO: Birth Defect Linked To Zika Virus Is 'Public Health Emergency'

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Aedes aegypti mosquitoes are displayed at an exhibition on Jan. 28 in Brazil. The mosquitoes can be carriers of the Zika virus. Several cases of the virus have spread to Puerto Rico. Mario Tama/Getty Images hide caption

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Puerto Rico Health Official 'Very Concerned' About Zika's Spread

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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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Measles, the reorganization of the World Health Organization and the Zika virus could all make global health headlines in 2016. Rich Pedroncelli, Raphael Satter, Felipe Dana/AP hide caption

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Medical workers surround 34-day-old Noubia, the last known patient to contract Ebola in Guinea, as she was released from a Doctors Without Borders treatment center in Conakry on Nov. 28. Cellou Binani /AFP/Getty Images hide caption

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Adama Sankoh, 40 (center), who contracted Ebola after her son died from the disease late last month, stands with health officials the moment after she was discharge from Mateneh Ebola treatment center outskirt of Freetown, Sierra Leone. Alie Turay/AP hide caption

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Transgender performers walk backstage during an event to mark World AIDS Day in 2013. A new WHO report demonstrates extremely rates of HIV infection among transgender women in 15 countries. Prakash Mathema/AFP/Getty Images hide caption

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Transgender Women Face Inadequate Health Care, 'Shocking' HIV Rates

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Since the first case on May 20, confirmed cases of Middle East respiratory syndrome, or MERS, have swelled to at least 30 in South Korea. Chung Sung-Jun/Getty Images hide caption

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Classes Canceled, 1,300 Quarantined In S. Korea's Scramble To Stop MERS

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The Ebola outbreak "overwhelmed" the World Health Organization and made it clear the agency must change, WHO's director-general, Dr. Margaret Chan, said Monday in Geneva. Fabrice Coffrini /AFP/Getty Images hide caption

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WHO Calls For $100 Million Emergency Fund, Doctor 'SWAT Team'

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Dr. Margaret Chan, director-general of the World Health Organization, has said of Ebola: "It overwhelmed the capacity of WHO, and it is a crisis that cannot be solved by a single agency or single country." Fabrice Coffrini/AFP/Getty Images hide caption

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Critics Say Ebola Crisis Was WHO's Big Failure. Will Reform Follow?

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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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Health workers rest outside a quarantine zone at a Red Cross facility in the town of Koidu, Kono district in Eastern Sierra Leone on Friday. The World Health Organization says the number of Ebola deaths in the current outbreak has exceeded 7,000. Baz Ratner/Reuters/Landov hide caption

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Community workers build an Ebola clinic on Nov. 8 in Lokomasama, near Port Loko, Sierra Leone. The community decided to organize and fight the disease — building a holding center for suspected cases, enforcing a travel ban. It created a $100 fine for a handshake and a $200 fine plus six months in jail for an illegal burial. Francisco Leong/AFP/Getty Images 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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When a high-risk patient is evacuated, strict precautions are followed. Above, aid workers and doctors in protective gear transfer Manuel Garcia Viejo, a Spanish priest diagnosed with Ebola, to a waiting ambulance at a Madrid airport. Spanish Defense Ministry/AP hide caption

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A licensed clinician is decontaminated before disrobing at the end of a simulated training session by CDC in Anniston, Ala. Training can take a several weeks, making some employers reluctant to encourage their medical workers to volunteer in the Ebola outbreak. Brynn Anderson/AP hide caption

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Ebola Volunteers Are Needed — But Signing On Isn't Easy

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Adrian Hill, director of the Jenner Institute and chief investigator of the trials with an Ebola vaccine his organization developed, holds a vial of the vaccine. Steve Parsons/WPA Pool/Getty Images hide caption

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Ebola Researchers Have A Radical Idea: Rush A Vaccine Into The Field

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