The Ebola outbreak in the Democratic Republic of the Congo has killed more than 1,700 people and infected over 3,800 as of August 5, 2026, making it the fastest-growing and now the deadliest Ebola outbreak in the country’s history. WHO Director-General Tedros Adhanom Ghebreyesus arrived in Kinshasa on August 5 and is expected to travel to Bunia, the capital of Ituri province, where nearly 90% of confirmed cases have been recorded.
Key Takeaways
- The DRC has recorded 3,802 confirmed Ebola cases and 1,707 deaths as of August 5, 2026, with a crude case fatality ratio of approximately 44%.
- The outbreak, declared on May 15, is caused by the Bundibugyo strain of the Ebola virus, for which no approved vaccine or specific treatment currently exists.
- Ituri province accounts for roughly 90% of all confirmed cases, but the outbreak has now spread across 51 health zones in five provinces, including Tshopo province, home to the city of Kisangani.
- Africa CDC Director-General Jean Kaseya has warned that nearly 80% of new infections are coming from untraced community transmission rather than identified contact chains.
- Uganda declared itself Ebola-free in late July after discharging its last patient and completing the initial monitoring period; two imported cases were also treated in Germany and one in France.
The Outbreak Has Surpassed All Previous Congo Ebola Events in Scale
The World Health Organization confirmed in its latest Disease Outbreak News bulletin that the DRC outbreak has surpassed all prior Ebola events in the country, including the 2018-2020 North Kivu outbreak that killed 2,287 people over two years. The current outbreak has reached that scale in under three months, with case counts climbing by roughly 1,000 in a recent 10-day period alone.
The outbreak was initially detected in Mongbwalu Health Zone in Ituri Province after WHO received an alert on May 5 about a high-mortality illness that had already killed four health workers within four days. Laboratory testing by the Institut National de la Recherche Biomédicale in Kinshasa confirmed Bundibugyo virus on May 15. Two days later, WHO Director-General Tedros declared the outbreak a Public Health Emergency of International Concern, the organization’s highest level of alert.
The Bundibugyo strain presents a distinct challenge compared to previous Ebola outbreaks in the DRC, which were caused by the Zaire ebolavirus. Vaccines developed for the Zaire strain, including Merck’s rVSV-ZEBOV, have no demonstrated efficacy against Bundibugyo virus. That gap has forced the response to rely entirely on non-pharmaceutical interventions: contact tracing, isolation, safe burial practices, infection prevention protocols, and community engagement.
Geographic Expansion Strains the Response Infrastructure
The outbreak began in three health zones in Ituri Province and has since expanded to 51 health zones across five provinces. Ituri remains the epicenter with the vast majority of cases concentrated in and around the provincial capital Bunia, as well as the health zones of Rwampara, Mongbwalu, and Nyankunde. North Kivu province has recorded the second-highest number of cases across more than a dozen affected health zones.
The geographic expansion into Haut-Uele and Tshopo provinces is particularly concerning for public health authorities. Tshopo is home to Kisangani, one of the DRC’s largest cities and a major transportation hub on the Congo River. Cases confirmed in Kisangani’s surrounding health zones raise the risk of further spread through commercial shipping and overland trade routes that connect the eastern DRC to the rest of the country and to neighboring states.
The WHO Regional Office for Africa has noted in its weekly situation reports that transmission in some newly affected health zones likely preceded official detection by several weeks, meaning that the outbreak’s true geographic footprint at any given point may be larger than what confirmed case data reflects. Surveillance gaps remain a persistent obstacle, particularly in rural health zones with limited laboratory capacity and difficult road access.
Community Transmission Outpacing Contact Tracing
Africa CDC Director-General Jean Kaseya, who visited Bunia in early August for his second trip to the outbreak zone, described a surveillance breakdown that complicates containment. Nearly 80% of new confirmed cases are not linked to previously identified contacts, meaning the virus is spreading through community channels that health workers cannot see or interrupt in real time.
The contact tracing gap is driven by several factors. Many patients in Ituri province seek care from traditional healers before visiting formal health facilities, delaying detection and allowing secondary transmission chains to establish. Health workers in the region have themselves been disproportionately affected, with infections among medical staff documented since the outbreak’s earliest days. Fear and misinformation have also led some communities to resist surveillance teams, a pattern observed in previous Ebola outbreaks in eastern Congo where decades of armed conflict have eroded trust in government institutions and international organizations.
Hospitals in Bunia have been overwhelmed since the outbreak’s early weeks, prompting the DRC government and WHO to establish field hospitals and additional isolation centers. The capacity constraints are compounded by the region’s broader humanitarian crisis, with hundreds of thousands of internally displaced people living in crowded camps in and around Bunia, creating conditions that accelerate respiratory and contact-based disease transmission.
Clinical Trials and the Search for Medical Countermeasures
Two clinical trials for post-exposure prophylaxis drugs are currently underway in Ituri province, offering potential near-term tools to protect individuals who have been exposed to confirmed Ebola patients. Separate vaccine trials targeting the Bundibugyo strain are ongoing in the United Kingdom and Canada, though these are in earlier stages and would not produce results deployable at scale during the current outbreak.
The absence of an approved vaccine has shaped the response in fundamental ways. During the 2018-2020 outbreak in North Kivu, the availability of the rVSV-ZEBOV vaccine allowed ring vaccination of contacts and health workers, a strategy widely credited with helping to bring that outbreak under control. No equivalent tool exists for the Bundibugyo strain, forcing the response to rely on the same public health fundamentals that defined Ebola containment efforts before vaccines were available: rapid isolation of cases, meticulous contact tracing, community-level behavior change, and safe and dignified burial of the deceased.
WHO has noted that research and development efforts to identify medical countermeasures for Bundibugyo virus are being mobilized, but the timeline for any licensed product remains uncertain. In the interim, supportive clinical care, including intravenous fluids, electrolyte management, and treatment of secondary infections, remains the standard of care for patients in DRC isolation centers.
Uganda Declared Ebola-Free as International Spread Remains Limited
Uganda discharged its last Ebola patient from the Mulago National Referral Isolation Centre in mid-July and began the standard 42-day countdown toward declaring the outbreak over. The country recorded 20 confirmed cases and two deaths during the outbreak, with most cases linked to individuals who had crossed from the DRC. No new cases were reported after June 21.
Two imported cases were also identified outside the African continent. A U.S. citizen working for a humanitarian organization in the DRC tested positive and was medically evacuated to Germany for treatment. A French doctor returning from a humanitarian mission in the outbreak zone was confirmed positive in France in late June. Both patients received specialized care in European isolation facilities. Germany has treated two medically evacuated cases in total during the outbreak.
FAQs
What Strain of Ebola Is Causing the 2026 Congo Outbreak?
The 2026 outbreak in the Democratic Republic of the Congo is caused by the Bundibugyo strain of the Ebola virus. This strain is distinct from the Zaire ebolavirus that caused previous major outbreaks in the DRC. No approved vaccine or specific antiviral treatment exists for Bundibugyo virus disease, though clinical trials for prophylaxis drugs are underway in Ituri province and vaccine trials are ongoing in the UK and Canada.
How Many People Have Died in the 2026 Ebola Outbreak?
As of August 5, 2026, the DRC has reported 3,802 confirmed cases and 1,707 deaths, with a case fatality ratio of approximately 44%. The outbreak was declared on May 15, 2026, and reached the 1,000-death mark in roughly two months, making it the fastest-growing Ebola outbreak on record. WHO declared it a Public Health Emergency of International Concern on May 17.
Is Ebola Spreading Outside the Democratic Republic of the Congo?
Uganda recorded 20 confirmed cases and two deaths but discharged its last patient in mid-July and has reported no new cases since June 21. Two imported cases were also treated in Germany and one in France, all involving health workers or humanitarian personnel who contracted the virus in the DRC. WHO continues to assess the risk of further international spread as elevated, particularly for neighboring countries connected by trade and migration routes.
