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Four healthcare workers at Mongbwalu General Referral Hospital die within four days of each other after caring for severely febrile patients linked back to Case A's contact chain. The cluster prompts the Ituri Provincial Health Division to file the alert that triggers the 5 May WHO notification; IPC assessments later identify multiple breaches in personal protective equipment use and patient triage at the facility.
Case A dies on the third day of illness at a medical centre in Bunia (the Ituri provincial capital) after deterioration consistent with viral haemorrhagic fever. The death is recorded as 'fièvre hémorragique d'origine indéterminée' on the provincial line list; samples are not collected at this stage and the body is released for community burial, an event later identified as a likely amplification node for the Rwampara cluster.
Earliest currently known suspected case (Case A) — a healthcare worker at the Mongbwalu Health Zone reports symptom onset with high fever, vomiting, intense malaise and mucosal haemorrhaging on 24 April 2026. Per WHO DON602 the worker had been managing severe febrile patients at an informal clinic in Mongbwalu town in the preceding 10 days; no protective equipment beyond gloves was available. The case is referred onward to Bunia for higher-level care.