ANALYZING THE BUNDIBUGYO EBOLA OUTBREAK IN THE DRC
Overview
The Democratic Republic of the Congo’s (DRC) latest Ebola outbreak represents a significant regional health security threat, driven by the emergence of the rare Bundibugyo Ebola virus strain, which currently has no approved vaccine or therapeutics. Rapid case growth, cross-border transmission into Uganda, and evidence of widespread community spread indicate the outbreak is likely substantially larger than confirmed figures suggest. The outbreak also carries international implications, as the U.S. government has implemented enhanced screening and travel restrictions for individuals arriving from affected areas, directing all individuals who have visited the DRC, Uganda, or South Sudan to return via Washington Dulles International Airport.
ANALYSIS
In May 2026, the DRC recorded its 17th Ebola outbreak, caused by the Bundibugyo Ebola virus (BDBV), a rare strain with no vaccine or approved therapeutics. As of May 21, more than 600 suspected cases, 139 deaths, and 50 confirmed cases had been reported across at least 11 health zones in Ituri Province and one case in Goma, North Kivu Province.
On May 15, the DRC Ministry of Health confirmed an outbreak of Ebola disease in Ituri Province.
On May 16, Uganda confirmed two imported cases, with one fatality, linked to travel from DRC.
On May 17, the World Health Organization (WHO) declared the outbreak a Public Health Emergency of International Concern (PHEIC).
The Bundibugyo Ebola virus was first identified in Uganda's Bundibugyo District in 2007 and caused two prior outbreaks: the 2007 to 2008 Uganda outbreak and a 2012 outbreak in Isiro, DRC. Unlike the better-known Zaire ebolavirus, for which the approved Ervebo vaccine exists, BDBV has no vaccine. The virus carries an estimated case fatality rate of 25 to 50 percent, and the WHO reported high positivity rate in initial sampling, with eight positives from 13 samples, suggesting significantly broader community transmission than confirmed figures reflect.
This is not a new vulnerability for DRC. The country has recorded 17 Ebola outbreaks since 1976, more than any other nation.
The 2018 to 2020 North Kivu and Ituri outbreak, the second-largest in history at more than 3,400 cases, demonstrated how conflict, community mistrust, and infrastructure gaps can transform a manageable outbreak into a prolonged epidemic. The current outbreak originates in the same area.
The first case of the latest outbreak was traced to a health worker in Bunia, Ituri Province, who developed symptoms on April 24, and died at a medical center in Bunia. Health workers were initially affected with severe illnesses in early May, and the outbreak was formally declared on 15 May. Suspected case numbers rose from 246 to more than 500 in under 96 hours, indicating rapid and likely underdetected community transmission.
Ituri Province is among the most conflict-affected territories in eastern DRC. The Allied Democratic Forces (ADF), the Cooperative for the Development of the Congo (CODECO), and numerous other armed actors maintain a persistent presence across the province.
In May, a rebel attack in the northeastern province killed at least 69 people.
The ongoing insecurity compounds the risk of spread, likely repeating the dynamics of the 2018 to 2020 outbreak, in which armed group interference with response teams was an aggravating factor. The conflict has also degraded the medical monitoring systems in the DRC. A
U.S. funding cuts beginning in March 2025 led to reduced operations in Ituri from five areas to two.
U.S. Department of Health and Human Services foreign aid to DRC fell from approximately $33 million in 2024 to under $10 million in 2025.
U.S. Agency for International Development (USAID) assistance dropped from approximately $1.2 billion in 2024 to $67 million in 2025.
These programs had historically functioned as informal surveillance networks in areas outside formal government reach. The International Rescue Committee directly linked this surveillance gap to both the delayed detection of the outbreak and the speed of its escalation.
Mongbwalu health zone, the epicenter of the current outbreak, is a high-traffic gold-mining hub with significant informal labor movement. Epidemiologists assessed early cases migrated from Mongbwalu to Rwampara and Bunia health zones as individuals sought medical care, introducing the virus into semi-urban settings with weaker infection prevention and control infrastructure. Bunia's population density and its connectivity to Goma, Kampala, and Kinshasa create multiple pathways for further spread.
OUTLOOK
Concentric assesses the outbreak is likely to continue expanding across Ituri Province in the near term, with a realistic possibility of further confirmed cases in Goma, Kampala, and other regional urban centers. The presence of unlinked cases in Kampala, combined with high-volume cross-border movement, sustains a risk of further regional spread. The WHO explicitly assessed a "significant local and regional risk of spread."
Without a targeted vaccine, containment relies on contact tracing, isolation, and community engagement. In a conflict-affected province with degraded surveillance, these interventions face severe operational constraints. The 2018 to 2020 outbreak, in which a similar environment extended that to nearly two years. The risk landscape across the DRC is unlikely to stabilize in the near term. Active conflict, weakened health infrastructure, an unvaccinated population, and the absence of approved therapeutics sustain an elevated and potentially worsening public health risk environment for the remainder of 2026. BDBV cases having already been detected in neighboring Uganda suggest it is likely further cases may cross borders into adjacent countries exacerbating the outbreak. Authorities in several countries have already increased monitoring of travelers arriving from affected areas. U.S. bound travelers from the DRC must only enter through Washington Dulles International Airport (IAD). On May 20, An Air France flight bound for Detroit from Paris was diverted to Montreal Trudeau International Airport because a passenger from the DRC was boarded in error, violating recent entry restrictions. The Department of Homeland Security requires all passengers who have been in the DRC, Uganda, or South Sudan within the last 21 to undergo enhanced Ebola health screenings. Individuals traveling to or from affected areas should prepare for health screenings, possible quarantine requirements, and rapidly changing entry regulations.
HOW CONCENTRIC CAN HELP
Concentric offers a suite of services designed to mitigate risks and enable secure business operations in unpredictable environments:
Travel Risk Assessments and Alerting: Concentric’s intelligence team delivers bespoke reports with real-time, itinerary-focused evaluations of geopolitical, security, and infrastructure risks tailored to traveller movements and operating environments, informing security mitigation measures.
Security Operations: Concentric provides on-the-ground advisory support, executive protection, and operational security planning across Somalia and the wider Horn of Africa.
Crisis Management: Concentric’s crisis management teams at SPS are trusted by Lloyd’s of London and remain on hand to support crisis response and provide pre-travel consultancy across the Horn of Africa.
Through Concentric’s advanced geopolitical intelligence capabilities, organisations can navigate travel risks, safeguard personnel, and maintain operational continuity across complex environments. For further information or to arrange a consultation, please contact our Global Intelligence team today.