In her first visit to the cemetery, she wept into her shirt for the child she lost and worried about the rest of her family. "When she was born, it was as if God had answered our prayers—we wanted a girl," Wisoba said of little Maombi Katengey. "But our biggest joy was transformed into devastation."

Her daughter is one of more than 6,000 people officials suspect have contracted the disease in South Kivu province, the epicenter of the world's latest mpox outbreak, in what the World Health Organization has labeled a global health emergency. A new strain of the virus is spreading, largely through skin-to-skin contact, including but not limited to sex. A lack of funds, vaccines and information is making it difficult to stem the spread, according to alarmed disease experts.

Mpox—which causes mostly mild symptoms like fever and body aches, but can trigger serious cases with prominent blisters on the face, hands, chest and genitals—had been spreading mostly undetected for years in Africa, until a 2022 outbreak reached more than 70 countries. Globally, gay and bisexual men made up the vast majority of cases in that outbreak. But officials note mpox has long disproportionately affected children in Africa, and they say cases are now rising sharply among kids, pregnant women and other vulnerable groups, with many types of close contact responsible for the spread.