The Bundibugyo Ebola outbreak in the Democratic Republic of the Congo has surpassed the 2018 to 2020 Kivu epidemic in total cases, making it the largest Ebola outbreak ever recorded outside the 2014 to 2016 West Africa epidemic. World Health Organization data current through July 30 put the toll at 3,605 confirmed cases and 1,587 deaths, a crude case fatality ratio of 44%.
The outbreak took 76 days to pass a case total that Kivu reached over 23 months. The last week of July was the worst yet recorded, with 567 cases and 296 deaths reported in a single epidemiological week, roughly 42 deaths a day.
The development that changes the practical picture for households outside Africa is not the ranking itself. It is that transmission is still accelerating in a region where response teams cannot reliably reach patients, against a virus species for which no licensed vaccine or targeted treatment exists.
Latest verified update: WHO Disease Outbreak News, data through July 30, 2026. Deaths reported by other sources through the first week of August exceed 1,700 in DRC, with two additional deaths in Uganda.
The Numbers That Changed and Which Ones Are Disputed
The clean comparison is on cases. The Kivu epidemic ended with 3,481 total cases, including confirmed and probable. The 2026 outbreak's 3,605 confirmed cases now exceed that.
The comparison on deaths is different, and coverage has blurred it. Kivu recorded 2,299 deaths. The West Africa epidemic recorded more than 11,000 from roughly 28,616 confirmed, probable, and suspected cases. At 1,587 to 1,707 confirmed deaths, the current outbreak ranks third by death toll, not second. Some outlets have described it as the second deadliest. On the verified figures, it is the second largest by case count and, given a 44% case fatality ratio and rising transmission, is on a trajectory that could change that ranking.
WHO has said the true scale could be up to four times higher than official figures, which would place actual infections somewhere between roughly 7,200 and 14,400 as of the end of July.
Ituri province accounts for about 88% of confirmed cases and roughly 83% of deaths, according to CIDRAP's summary of WHO reporting. The outbreak spans 49 of 140 health zones across Ituri, North Kivu, South Kivu, Haut-Uele, and Tshopo. Health workers have not been spared, with 151 cases and 44 deaths among them, a case fatality ratio of 29%.
The Reasons This Outbreak Outran the Response
Three factors distinguish it from previous Congolese outbreaks.
The virus species is the first. Bundibugyo ebolavirus has caused only three outbreaks in history. The licensed Ebola vaccine and the two approved monoclonal antibody treatments were developed and authorized against Zaire ebolavirus, a different species. WHO expert groups concluded in late May that evidence on cross-protection is limited and inconclusive, and recommended candidate products be used only within clinical trials.
Conflict is the second. As Al Jazeera has reported, eastern DRC has dozens of active armed groups, and health facilities have been attacked. Contact tracing requires repeatedly reaching households, which is not possible in areas responders cannot enter safely. About three-quarters of identified contacts in Ituri are under active follow-up, meaning a quarter are not.
Resources are the third. WHO Director-General Tedros Adhanom Ghebreyesus put the funding gap in the joint WHO and Africa CDC continental plan at more than $400 million in mid-July and said the outbreak continued to outpace the response. Angele Gapio, head of emergencies for the Caritas charity in Bunia, told Reuters that the disease has settled into the community and that transmission chains continue as people seek care from traditional healers.
The Effect Beyond Central Africa
For US households, the direct risk remains low, and no case from this outbreak has been confirmed in the United States. The pathways that matter are specific rather than general.
Travel is the clearest. Anyone with plans to DRC, Uganda, or neighboring countries, and anyone working with aid organizations, medical missions, or global health programs, is directly affected. The CDC has maintained entry restrictions covering travelers who have recently been in DRC, Uganda, or South Sudan, renewed in 30-day increments since May 18. Exported cases have already reached Uganda's capital and France, and two Americans doing humanitarian work were medically evacuated to Germany.
The second pathway is the medical countermeasure supply. Because existing products target a different species, the response depends on trials rather than deployment. MedicalDaily reported this week on Africa CDC's move to test Merck's licensed Ebola vaccine against Bundibugyo virus, a decision that will determine whether an existing product can be repurposed at scale.
What remains unconfirmed is substantial. The true case count is unknown. Whether Ervebo confers meaningful cross-protection has not been established. Whether the three Bundibugyo-specific clinical trials that began enrolling in July will produce usable results during this outbreak is unknown.
Developing Story Timeline
July 31, 2026: Africa CDC's plan to present evidence to WHO vaccine advisers supporting an Ervebo trial against Bundibugyo virus is reported.
July 30, 2026: WHO reports 3,605 confirmed cases and 1,587 deaths, surpassing the Kivu epidemic's case total. Epidemiological week 30 records 567 cases and 296 deaths.
July 20, 2026: DRC Ministry of Health reports 930 deaths among 2,344 laboratory-confirmed cases, including 37 deaths in a single 24-hour window.
June 21, 2026: CDC issues a renewed 30-day entry order covering DRC, Uganda, and South Sudan.
May 16, 2026: WHO declares the outbreak a Public Health Emergency of International Concern.
May 15, 2026: DRC's Ministry of Health confirms Bundibugyo virus in Ituri Province, the country's 17th Ebola outbreak.
Frequently Asked Questions
What changed? The outbreak passed the 2018 to 2020 Kivu epidemic in total cases, becoming the largest Ebola outbreak recorded outside the 2014 to 2016 West Africa epidemic.
Is it the second deadliest? Not by death toll. Kivu recorded 2,299 deaths and West Africa more than 11,000. The current outbreak is the second largest by case count and third by confirmed deaths.
Why is this strain harder to fight? Bundibugyo ebolavirus differs from the Zaire species that licensed vaccines and treatments were developed against. Cross-protection evidence is limited and inconclusive.
How current are these numbers? WHO figures are current through July 30, 2026. Later reports place deaths above 1,700. WHO says true totals could be up to four times higher.
What is the risk to people in the United States? Low. No case from this outbreak has been confirmed in the US. Entry restrictions covering DRC, Uganda, and South Sudan remain in place.
Should I change travel plans? Anyone traveling to DRC, Uganda, or neighboring countries should check current CDC travel notices and entry orders before booking, and consult a travel medicine clinic.
What happens next? Watch for WHO's next Disease Outbreak News update, Africa CDC's presentation to WHO vaccine advisers on Ervebo, and results from the three Bundibugyo-specific trials that began enrolling in July.
