Most of the cases over the past 3 weeks are from four health zones, and the majority of those are from the Biakato Mines area in Ituri province’s Mandima health zone. The rest are linked to known transmission chains in Binase, Katwa and Lwemba health areas. Lwemba is where a violent attack recently occurred that killed an Ebola response community health workers and severely injured his wife. The WHO warned that spread to earlier affected or still unaffected neighboring areas is possible and expected and should be closely monitored. It added that about half of the people infected in the last 21 days were diagnosed outside of the health zone where they were exposed, mostly people traveling to or from Mandima health zone.