Developing Story Note: This report covers new developments involving the Bundibugyo Ebola outbreak in the Democratic Republic of the Congo. Information may change as health agencies release additional findings. CDC figures are data through Nov. 1, 2026, from a page updated Nov. 3. Africa CDC death figures were reported Nov. 2, 2026, with Congo data through Oct. 31.

The Bundibugyo Ebola outbreak in the Democratic Republic of the Congo has passed 10,000 confirmed cases, and Africa CDC's latest count shows more than half of infected people have died. Africa CDC reported 5,376 deaths as of Nov. 2, according to Al Jazeera, with about 10,444 infections across Congo, Uganda, and Kenya.

The U.S. CDC's situation page, using confirmed cases only, lists 10,563 cases and 5,130 deaths through Nov. 1. By that measure, just under half of confirmed patients have died. Either way, the outbreak crossed two grim thresholds in the same week — and it is now among the deadliest Ebola epidemics on record.

Two Agencies, Two Counts, One Trend

The difference between the two tallies matters for readers trying to understand the numbers. CDC counts confirmed cases and confirmed deaths separately and excludes suspected cases pending investigation. Africa CDC's figures, given to reporters, were compiled on a different schedule. Neither agency explained the gap publicly, and the true fatality rate may shift as recent patients recover or die.

What both counts show is a death rate far higher than many recent outbreaks. The World Health Organization says Ebola fatality has ranged from about 25% to 90% in past outbreaks. Euronews, citing AFP, described this as the fastest-growing and most widespread Ebola epidemic on record.

Nature World News previously reported that cases were nearing 10,000 as Congo launched its first vaccine trial and the U.S. added a travel attestation. At that time, CDC data through Oct. 23 showed 9,847 cases and 4,761 deaths. In roughly nine days, about 700 more confirmed cases and nearly 370 more deaths were added.

The Strain That Existing Shots Were Not Built For

Bundibugyo is one of several viruses that cause Ebola disease, and it is rare. Before 2026, it had caused only two known outbreaks, in Uganda in 2007 and Congo in 2012, each with fewer than 60 cases.

That rarity is the core problem — the vaccine and antibody treatments developed over the past decade target Zaire ebolavirus, the species behind the 2014 to 2016 West African epidemic. The Associated Press reports none is approved for Bundibugyo. Doctors in Congo are now testing whether Ervebo, the licensed Zaire vaccine, offers any cross-protection, with Bundibugyo-specific candidates expected to follow. No result from that trial has been published.

Conflict compounds the medical gap. Eastern Congo has seen attacks on Ebola facilities and displacement, which slows contact tracing and keeps sick people from early care. Early in the outbreak, WHO Director-General Tedros Adhanom Ghebreyesus warned that responders were "playing catch-up" after delayed detection.

Where the Virus Has Spread

CDC lists confirmed cases in eight Congolese provinces: Bas-Uele, Haut-Uele, Ituri, Nord-Kivu, Sud-Kivu, Sud-Ubangi, Tshopo and Nord-Ubangi. Ituri, the original epicenter around Bunia, has carried the largest share.

Beyond Congo, Uganda recorded 20 cases before its outbreak was declared over. Kenya confirmed its first-ever Ebola cases in October, nine in all with two deaths, all in Nairobi and all linked to the first patient. Kenya's health ministry has reported no community spread.

Nigeria confirmed one imported case on Oct. 20 in Abuja. The European Centre for Disease Prevention and Control said that the patient and a close contact were medically evacuated to Switzerland on Oct. 26. France treated one case in July, and that patient has recovered.

Low Risk at Home, New Rules at the Airport

For Americans, the official message is unchanged. "The overall risk to the American public and travelers remains low," the CDC states. CDC's case table lists no cases in the United States.

What has changed is airport procedure. After 11:59 p.m. EST on Nov. 3, every passenger on an international flight to the United States must attest they have not been in Congo in the previous 21 days. Travelers who were in Congo within 21 days cannot board commercial flights to the U.S. U.S. citizens and nationals arriving from Uganda or South Sudan must enter through designated airports for enhanced screening.

CDC's Level 4 notice tells Americans to avoid all travel to Ituri and Nord-Kivu provinces. It advises reconsidering nonessential travel to Haut-Uele and Tshopo, and enhanced precautions elsewhere in Congo and in Uganda.

The people most affected by these rules are aid workers, health care staff, missionaries, business travelers and families with relatives in the region. Anyone with recent travel to an affected area who develops fever, severe headache, muscle pain, vomiting, diarrhea or unexplained bleeding within 21 days should call a doctor or health department before arriving at a clinic, so staff can prepare. Ebola spreads through direct contact with the blood or body fluids of a sick person, not through casual contact or the air.

Several important questions remain unanswered. It is not yet known whether Ervebo protects against Bundibugyo, whether the Kenya and Nigeria clusters are fully contained, or whether cases in Ituri are truly declining. The next data points to watch are CDC's weekly situation updates, WHO's Disease Outbreak News reports, and early findings from the vaccine trial.

The milestone is grim, and the outbreak is not under control. Still, the danger remains concentrated in eastern Congo and among people with direct exposure. For U.S. readers, the practical step is limited to travel awareness and early reporting of symptoms after time in affected areas.

What Readers Want to Know

How many Ebola cases are there in Congo? CDC lists 10,532 confirmed cases in Congo and 10,563 across all affected countries, with data through Nov. 1, 2026.

Is the death rate really above 50%? Africa CDC's count puts deaths slightly above half of infections. CDC's confirmed-only count is just under half. The rate may change as recent cases resolve.

Why is Bundibugyo harder to fight? Approved Ebola vaccines and antibody treatments target a different species, Zaire ebolavirus. None is approved for Bundibugyo.

Which countries have reported cases? Congo, Uganda, Kenya, Nigeria, and France. Uganda and France have no active cases.

What is the risk to Americans? CDC says the overall risk to the American public and travelers remains low.

What changed for U.S.-bound travelers? Since 11:59 p.m. EST on Nov. 3, all international passengers must attest they have not been in Congo in the previous 21 days.