Bundibugyo outbreak in DRC and Uganda reaches 695 cases, 138 deaths

September 19, 2026 at 05:00 AM2 min

This digest was compiled by AI from multiple sources — links to the originals are below.

A Bundibugyo virus outbreak in the Democratic Republic of Congo and Uganda has reached 695 confirmed cases and 138 confirmed deaths as of June 11, according to the WHO. Boston University professor Nancy Sullivan argues in the New England Journal of Medicine that outbreak preparedness must extend beyond high-profile diseases. The current outbreak has already surpassed the scale of the only two previously recognized Bundibugyo outbreaks, in Uganda in 2007 and DRC in 2012.

Key Facts

The WHO reported 695 confirmed cases and 138 confirmed deaths from Bundibugyo virus in the DRC and Uganda as of June 11.
Bundibugyo virus belongs to the filovirus family, which also includes Ebola virus.
The only two previously recognized Bundibugyo outbreaks occurred in Uganda in 2007 and in the DRC in 2012.
The 2026 outbreak was formally recognized after the death of a nurse.
Boston University professor Nancy Sullivan published a review article in the New England Journal of Medicine on outbreak preparedness.

Outbreak Scale

The current Bundibugyo outbreak has already surpassed the two previously recognized outbreaks in both trajectory and scale. The WHO reported 695 confirmed cases and 138 confirmed deaths in the DRC and Uganda as of June 11. The 2026 outbreak was formally recognized after the death of a nurse.

Clinical Features

Bundibugyo virus can cause a severe form of hemorrhagic fever with widespread inflammation, damage to blood vessel lining cells, uncontrolled bleeding, and multiple organ failure. The virus spreads through direct contact with infected bodily fluids, posing particular risks for family members, caregivers, and health workers. Symptoms overlap with malaria, typhoid fever, and other common diseases, making laboratory testing necessary for confirmation.

Response Challenges

Laboratory access remains limited in parts of the DRC, and samples may need to travel considerable distances to reach national reference laboratories. Delays in specimen collection, transportation, and testing can postpone confirmation by days or weeks, hindering isolation, contact tracing, and outbreak-control measures. Boston University professor Nancy Sullivan argues that outbreak preparedness needs to extend beyond the infectious diseases that receive the most attention.