More than 2 months after it was discovered, the latest Ebola outbreak in the Democratic Republic of the Congo (DRC) is still out of control. The country had reported 2423 cases by 19 July, including 967 deaths, already making this the third largest Ebola outbreak ever recorded. Dozens of new cases are confirmed every day.

One worrisome sign, Ebola experts say, is that more than 80% of newly confirmed cases are not on any patient’s list of contacts, indicating that many chains of transmission are still being missed. Most new cases never receive any care in a health facility. Patients often die in their community and are confirmed as Ebola cases only after their death.