Ebola Returns: The Bundibugyo Outbreak Threatening Central Africa
A rare strain of Ebola with no approved vaccines or treatments is spreading through eastern Congo and into Uganda, killing over 130 people and prompting the WHO to declare a global health emergency.
A rare and particularly dangerous strain of Ebola is sweeping through the Democratic Republic of Congo’s eastern provinces, killing at least 134 people and infecting over 500 suspected cases — and the world is only now catching up to the full scale of the crisis.
On May 17, the World Health Organization declared the outbreak a public health emergency of international concern (PHEIC), its highest level of alert. The Bundibugyo ebolavirus — responsible for only two small outbreaks in history — has no approved vaccines and no approved treatments. That fact alone makes this outbreak fundamentally different from the Ebola crises the world has faced before.
How It Started
The first known death occurred on April 24 in Bunia, the capital of Ituri province. A nurse fell ill with symptoms consistent with Ebola and died at a local hospital. Her body was repatriated to the Mongbwalu health zone, a densely populated mining area — and that, according to Congo’s health minister Samuel Roger Kamba, is where the outbreak truly ignited.
What followed was a cascade of failures. Samples sent to Kinshasa, over 1,000 kilometers away, were tested only for the Zaire strain of Ebola — the most common type. They came back negative. Local authorities assumed it wasn’t Ebola at all. Only laboratories in Kinshasa and Goma had the capacity to test for the Bundibugyo virus, and by the time the first confirmation came on May 14, the virus had been spreading undetected for nearly three weeks.
“Our surveillance system didn’t work,” admitted Jean-Jaques Muyembe, a virologist at Congo’s National Institute of Bio-Medical Research.
A Rare and Dangerous Strain
The Bundibugyo virus was first identified in 2007 during an outbreak in Uganda that sickened 55 people. A second outbreak in Congo in 2012 infected 57. Both were contained relatively quickly. This time is different.
The confirmed cases have appeared in Bunia, Goma (a rebel-held city of over a million people), Mongbwalu, Nyakunde, and Butembo — a vast geographic spread across conflict-ridden territory. At least four health workers are among the dead, including an American doctor, Dr. Peter Stafford, who was treating patients at a hospital in Bunia.
Crossing Borders
Uganda confirmed its first case on May 14 — a person who had traveled from Congo and died at Kibuli Muslim Hospital in Kampala. A second confirmed case followed within a day. The Africa CDC has expressed concern about further spread to South Sudan, given the proximity of affected areas to multiple borders.
Dr. Anne Ancia, head of the WHO team in Congo, was blunt about the timeline: “I don’t see that in two months we will be done with this outbreak.”
The Response Gap
The response is hampered by multiple factors. Congo’s eastern provinces are caught in ongoing conflict, with the Rwanda-backed M23 rebel group controlling Goma. Infrastructure is among the worst in the world — a country the size of Western Europe with barely any paved roads connecting its eastern reaches to the capital.
Neither the U.S. CDC nor the Africa CDC has personnel on the ground yet. Doctors Without Borders and the Red Cross are operating, but resources are stretched thin. The WHO is considering whether the Ervebo vaccine — designed for the Zaire strain — might offer cross-protection, but even if approved, it would take two months to deploy.
The Trump administration’s earlier withdrawal from WHO and deep cuts to foreign aid have weakened the very surveillance systems designed to catch outbreaks like this early, according to Georgetown University’s Matthew Kavanagh. The U.S. State Department has pledged $13 million in assistance.
What Comes Next
The WHO has advised against closing international borders, noting that the outbreak does not yet meet criteria for a “pandemic emergency” like COVID-19. But with cases in urban centers, dead health workers, and significant population movement across porous borders, the situation is precarious.
For the people of Bunia, the threat is immediate and personal. “Every day, people are dying,” said resident Jean Marc Asimwe. “In a single day, we bury two, three, or even more people.”
This is Congo’s 17th Ebola outbreak since the virus was first identified there in 1976. The world has beaten Ebola before. But this strain — unfamiliar, unvaccinated, and unchecked for critical weeks — presents a challenge the global health system may not be fully prepared to meet.