WHO Declares PHEIC for Bundibugyo Virus (Ebola) Outbreak in DRC and Uganda
WHO has officially declared the Bundibugyo virus disease (BVD) outbreak in the Democratic Republic of the Congo and Uganda a Public Health Emergency of International Concern (PHEIC). However, it does not meet the threshold of a pandemic emergency under the IHR.
The Numbers (as of May 16, 2026):
- 8 laboratory-confirmed cases, 246 suspected cases, and 80 suspected deaths in Ituri Province, DRC (across Bunia, Rwampara, and Mongbwalu health zones)
- 2 confirmed cases (1 death) in Kampala, Uganda, both in ICU and linked to travel from DRC, with no apparent epidemiological link to each other
- A suspected case in Kinshasa was ruled out by confirmatory testing
- At least 4 healthcare worker deaths from suspected viral hemorrhagic fever, so nosocomial transmission is a concern (as usual in these settings)
The initial sample positivity rate was unusually high (8/13, or about 62%), suggesting the true case count is likely much larger than reported. The affected area mirrors the geography of the devastating 2018–19 North Kivu/Ituri Ebola-Zaire epidemic, with the same compounding factors: conflict, humanitarian crisis, high population mobility, and informal health facilities.
The critical difference this time? There are no approved vaccines or therapeutics for Bundibugyo virus, unlike Ebola-Zaire strains (which have ERVEBO and mAb114/ZMapp). This is not the Zaire strain. Clinical trials for countermeasures are urgently called for.
This is a rapidly evolving situation with significant epidemiological uncertainty. The high positivity rate, healthcare worker deaths, and cross-border spread to Kampala within days of the initial cluster are all red flags. Watch this space closely.