The Rev. Herman Browne voluntarily quarantined himself for 21 days after his wife's friend tested positive for Ebola. On Sunday, he returned to his church, Trinity Cathedral, to preach to his congregation about Ebola prevention. Jon Hamilton/NPR hide caption

itoggle caption Jon Hamilton/NPR

Thomas Eric Duncan, the first Ebola patient diagnosed in the U.S., at a wedding in Ghana. Texas Health Presbyterian Hospital Dallas, where Duncan was being treated for the disease, on Wednesday, Oct. 8, 2014 said Duncan has died. Wilmot Chayee/AP hide caption

itoggle caption Wilmot Chayee/AP

Dr. Wvennie MacDonald, the administrator of the JFK Memorial Hospital, has helped put new procedures in place to keep Ebola out, including a triage station to identify possible Ebola patients at the front gate. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

Emergency room doctor Joshua Mugele, bearded and bespectacled, with nurses at Liberia's JFK Hospital. The man in front of him is Chad Priest, an assistant dean at the Indiana University School of Nursing. Both worked at the hospital this past summer. Courtesy of Joshua Mugele hide caption

itoggle caption Courtesy of Joshua Mugele

Dr. Patrick Kamara adjusts his googles on the final day of training and the first "dress rehearsal" before being sent out to Ebola treatment units. The World Health Organization is ramping up to train up to 500 new health workers a week as part of the effort to stem the spread of Ebola. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

NPR's Jason Beaubien (center, in sunglasses) talks with Liberians looking for work at the construction site for a 25-bed hospital in Monrovia. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

Dr. Gabriel Logan is one of two doctors at the Bomi county hospital, which serves a county of 85,000 people. In a desperate attempt to save Ebola patients, he started experimenting with an HIV drug to treat them. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

Liberian President Ellen Johnson Sirleaf visited West Point in August, when the impoverished neighborhood was quarantined to prevent the spread of Ebola. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

A vehicle that picks up hospital waste arrives at Teresa Romero Ramos' house in Alcorcon, outside Madrid, on Wednesday. The Spanish nurse was the first case of human-to-human Ebola contagion in Europe. Borja Garcia/EPA/Landov hide caption

itoggle caption Borja Garcia/EPA/Landov

The home of Marthalene Williams, the Ebola-stricken woman aided by Thomas Eric Duncan. A man on the porch, who appeared to be in the late stages of Ebola, informed our photographer that he'd been to a hospital but was told to return home and quarantine himself. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR

A team from Dr. Paul Farmer's Partners In Health nonprofit visited southeast Liberia's Martha Tubman Memorial Hospital in September. The hospital has a new, six-bed isolation unit financed by the U.N. Rebecca Rollins/courtesy of Partners in Health hide caption

itoggle caption Rebecca Rollins/courtesy of Partners in Health