quarters of cases have occurred in children under 5 and a small number of health care workers are among those adults infected, WHO said. The outbreak occurred along Angola's border with Congo, in Uige province. Authorities initially feared the deaths were caused by Ebola, which still exists in nature in Congo. "Marburg virus disease has no vaccine or curative treatment, and can be rapidly fatal," WHO explained. "In the present outbreak, most deaths have occurred between three to seven days following the onset of symptoms."
