A new Ebola virus disease outbreak, the 17th in the Democratic Republic of the Congo's history, has crossed into Uganda, triggering a World Health Organization Public Health Emergency of International Concern. Preliminary data links the resurgence to Bundibugyo virus, a genotype historically associated with lower mortality than the more common Zaire ebolavirus. Yet field reports describe an alarmingly high death toll, with more than 90 suspected deaths recorded as of May 18, 2026.
The outbreak emerged in Ituri Province, affecting the health zones of Rwampara, Mongbwalu, and Bunia. This is only the second Bundibugyo virus outbreak in DR Congo; the first occurred in 2007–08 in Uganda, and a subsequent one struck in 2012 in what is now Haut-Uele Province. Fragile local conditions—chronic insecurity, mass displacement, and limited diagnostic capacity—complicate containment efforts.
As of May 15, 2026, health authorities reported 246 suspected cases and 80 deaths, including four fatalities among confirmed cases. Imported cases have been confirmed in Kampala, Uganda. The WHO notes that previous case fatality rates for Bundibugyo virus range from 30% to 50%, though The Lancet reports a paradoxically higher rate in this outbreak, with more than 90 suspected deaths.
Transmission among health-care workers and within communities has already been documented, raising fears of wider spread. The outbreak's syndemic nature—interacting with underlying social and environmental stressors—amplifies the challenge for responders. Cross-border coordination between DR Congo and Uganda will be critical to slowing the virus's advance.
Experts caution that the true scale may be underestimated due to limited surveillance. The situation underscores persistent gaps in regional epidemic preparedness, despite repeated Ebola responses over the past decade.