Boys show off their four-legged friends at a rabies vaccination drive set up by the Serengeti Health Initiative in the Bariadi District of Tanzania. Anna Czupryna/Courtesy of Serengeti Health Initiative hide caption

itoggle caption Anna Czupryna/Courtesy of Serengeti Health Initiative

Some potential new Ebola drugs will be tested at treatment centers like this one run by Doctors Without Borders near Monrovia. John Moore/Getty Images hide caption

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Liberian physician Martha Zarway continues work in a temporary clinic while her original facility is disinfected. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

A poultry processing plant in France. Europe banned treating chicken carcasses with chlorine in the 1990s out of fear that it could cause cancer. Christophe Di Pascale/Corbis hide caption

itoggle caption Christophe Di Pascale/Corbis

Daniela Chavarriaga holds her daughter Emma as Dr. Jose Rosa-Olivares administers a measles vaccination at Miami Children's Hospital. Joe Raedle/Getty Images hide caption

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As the mayor of Cali, Colombia, epidemiologist Rodrigo Guerrero (left) meets with the police once a week to review murder statistics. Courtesy of Prensa Alcaldía de Calí hide caption

itoggle caption Courtesy of Prensa Alcaldía de Calí

Dr. Allan Ropper speaks with residents and fellows as they do rounds at the neuroscience intensive care unit at Brigham and Women's Hospital in Boston. M. Scott Brauer for NPR hide caption

itoggle caption M. Scott Brauer for NPR

In Sierra Leone, a burial team from the government carries the coffin of an Ebola doctor who succumbed to the virus. Funerals and other expressions of mourning are key moments for anthropologists to translate between native cultures and foreign aid efforts, anthropologist Ann Kelly says. Carl De Souza/AFP/Getty Images hide caption

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Abortions are legal in India. But many are performed by traditional midwives, called dais. Sometimes a dai rubs herbs on a woman's stomach or gives her plants to eat. Poulomi Basu for NPR hide caption

itoggle caption Poulomi Basu for NPR