Wencke Petersen, a Doctors Without Borders health worker, talks to a man through a chain link gate in September, when she was doing patient assessment at the front gate of an Ebola treatment unit. "There were days we couldn't take any patients at all," she tells NPR. Michel du Cille/The Washington Post hide caption

itoggle caption Michel du Cille/The Washington Post

Surveillance team member Osman Sow washes his boots after working in a potentially contaminated area of Freetown, Sierra Leone. Survey teams are sent out every day to assess sick people and dispatch burial teams to collect the dead. David Gilkey/NPR hide caption

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Dr. Komba Songu M'Briwah, left, talks on the phone while staff members disinfect offices at the Hastings Ebola Treatment Center in Freetown. David Gilkey/NPR hide caption

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Baby Sesay, a traditional healer in Sierra Leone, treated a child who later died, apparently of Ebola, and then became sick herself and went to a care center. As this photo was taken, her body seized up and she nearly collapsed. David P Gilkey/NPR hide caption

itoggle caption David P Gilkey/NPR

India has record no Ebola cases, but the country is on high alert and has quarantined hundreds of travelers from West Africa. This hospital in New Delhi has set up an Intensive Care Unit for potential Ebola patients. Sajjad Hussain/AFP/Getty Images hide caption

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Nurses Bridget Mulrooney and Kelly Suter volunteered to work for the International Medical Corps at an Ebola treatment unit in Liberia. IMC is reporting a drop-off in recruits this fall. Stuart J. Sia/International Medical Corps hide caption

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A woman enters the Ebola treatment center at the Island Hospital outside of Monrovia, Liberia, Oct. 6. She said she was bleeding heavily from a miscarriage and was turned away from other clinics in the city. John Moore/Getty Images hide caption

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Health workers in protective suits transport Dr. Martin Salia, a surgeon working in Sierra Leone who has been diagnosed with Ebola, from a jet that brought him from Sierra Leone to a waiting ambulance in Omaha, Neb., on Saturday. Nati Harnik/AP hide caption

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Health workers in protective suits transport Dr. Martin Salia, a surgeon working in Sierra Leone who has been diagnosed with Ebola, from a jet that brought him from Sierra Leone to a waiting ambulance in Omaha, Neb., on Saturday. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP

A town crier rides his moped through the city of Kayes in Mali, using his megaphone to warn people about Ebola. Nick Loomis/Courtesy of Global Post hide caption

itoggle caption Nick Loomis/Courtesy of Global Post

Medical workers will test the effectiveness of three new potential Ebola therapies at clinics run by the nongovernmental organization Medecins Sans Frontieres (Doctors Without Borders). Zoom Dosso/AFP/Getty Images hide caption

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