Nurith Aizenman

Denis Otieno and his daughter plant a cypress sapling purchased with money received from the charity GiveDirectly back in 2017. More recently, the charity teamed up with researchers to study the impact of cash grants on the wider community. Nichole Sobecki for NPR hide caption

Ronald Mutyaba, an auto mechanic, at his home in Kampala, Uganda. Mutyaba is HIV positive and has developed Karposi sarcoma, a type of cancer that often affects people with immune deficiencies. He is holding a bottle of the liquid morphine that nurses from the nonprofit group Hospice Africa have prescribed to help control the pain caused by his illlness. Nurith Aizenman/NPR hide caption

A Juul starter kit sold at a kiosk in a mall in Makati City in the Philippines. Carlo Gabuco for NPR hide caption

Renee Bach, 30, is being sued in Ugandan civil court over the deaths of children who were treated at the critical care center she ran in Uganda. She has left Uganda and is now living in Bedford County, Virginia, where she grew up. Julia Rendleman/for NPR hide caption

A police officer stands guard at a cemetery in Butembo during a funeral for people who died of Ebola. Many burial teams in Democratic Republic of the Congo have been attacked by hostile residents. John Wessels /AFP/Getty Images hide caption

Health workers marched in Butembo on Wednesday to protest the violence they're facing. The demonstration comes in the wake of an attack last Friday in which an epidemiologist from Cameroon was shot and killed. Al-hadji Kudra Maliro/AP hide caption