New York City Mayor Bill de Blasio talked about Dr. Craig Spencer last month at a news conference, and has another one set for Tuesday which Spencer will attend, Ebola-free. Andrew Burton/Getty Images hide caption

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An Ebola health alert is displayed at the entrance to Bellevue Hospital in New York City, where Dr. Craig Spencer was quarantined after showing symptoms consistent with the virus. Bryan Thomas/Getty Images hide caption

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The nursing staff get a break at the Ebola care center run by Doctors Without Borders in Foya, Liberia. The center has helped stop the spread of the virus. Michealeen Doucleff/NPR hide caption

itoggle caption Michealeen Doucleff/NPR

A female sanitation worker wears standard gear for a Doctors Without Borders Ebola center. The outfit includes rubber boots, goggles, a face mask, a hood, three layers of gloves, a Tyvek suit and thick rubber apron. No exposed skin is allowed. She was photographed in Monrovia, Liberia. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

New York Gov. Andrew Cuomo, left, listens Friday as New Jersey Gov. Chris Christie talks at a news conference in New York. The governors announced a mandatory quarantine for people returning to the United States through airports in New York and New Jersey who are deemed to be at "high risk" for Ebola. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP

After losing most of his family to Ebola, health worker Alexander Kollie (right) is building a new life with son Kollie James, the 1,000th survivor of the disease to be cared for by Doctors Without Borders. Katy Athersuch/Courtesty of Doctors Without Borders hide caption

itoggle caption Katy Athersuch/Courtesty of Doctors Without Borders

Medical workers in Monrovia, Liberia, put on their protective suits before treating Ebola patients Dominique Faget/AFP/Getty Images hide caption

itoggle caption Dominique Faget/AFP/Getty Images

Planet Money

Why Raising Money To Fight Ebola Is Hard

Donors like being part of a recovery story. It's hard to tell that kind of story about Ebola.

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Morris Nyumah wanted to help his country fight Ebola, so he signed up to work as a hygienist at the Doctors Without Borders care center in Lofa County. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Dr. Joanne Liu (left), international president of Doctors Without Borders poses with a member of the MSF medical team at the organization's Ebola treatment center in Kailahun, Sierra Leone. P.K. Lee/Courtesy of Doctors Without Border hide caption

itoggle caption P.K. Lee/Courtesy of Doctors Without Border

A man sits on a bed that will be part a new Ebola treatment center in Monrovia, run by Doctors Without Borders. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Health workers at the Doctors Without Borders facility in Kailahun wear protective clothing when treating Ebola patients. Carl De Souza/AFP/Getty Images hide caption

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Protective gear runs from goggles and head covering to gloves and boots. This health worker was photographed leaving the isolation area at the treatment center in Kailahun, Sierra Leone. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Sylvester Jusu is a volunteer who works with the Red Cross burial team in Sierra Leone. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR