Congo reports more Ebola cases as WHO expresses concern over scale and speed of the outbreak

A woman wearing a protective mask stands in the corridor of a hospital in Bunia, Congo, Sunday, May 17, 2026. (AP Photo/ Dirole Lotsima Dieudonne)

KINSHASA, Congo — At least 131 deaths and over 500 suspected cases have been reported in the latest Ebola outbreak in eastern Congo, the Congolese health ministry said Tuesday as the World Health Organization’s head expressed concern over the “scale and speed of the epidemic.”

The virus spread undetected for at least a few weeks since the first person died of the virus, health experts and aid workers said, and the delayed response is now complicating efforts to curb the outbreak.

Congo’s health minister, Samuel Roger Kamba, said 513 suspected cases and 131 deaths have been recorded, though he added “these are suspected deaths, and investigations are underway to determine which ones are actually linked to the disease.” The numbers mark a sharp increase from Monday, when officials said there were 300 suspected cases, and highlight the largely unknown scale of the outbreak.

The World Health Organization’s director-general, Tedros Adhanom Ghebreyesus, said he is “deeply concerned about the scale and speed of the epidemic” and the UN health agency will convene its emergency committee later Tuesday.

He said the emergence of cases in urban areas, the deaths of healthcare workers, significant population movement in the area and a lack of vaccines and therapeutics are the main reasons for concern “for further spread and further deaths.”

Health authorities say the outbreak, first confirmed Friday, is caused by the Bundibugyo virus, a rare variant of the Ebola disease that has no approved therapeutics or vaccines. The WHO declared the Ebola outbreak a public health emergency of international concern on Sunday.

Cases have been confirmed in Bunia, North Kivu’s rebel-held capital of Goma, Mongbwalu, Butembo, and Nyakunde. There has also been one case and one death reported in Uganda in people who traveled from Congo.

An American doctor is among the cases in Bunia, the capital of Ituri province, said Dr. Jean-Jacques Muyembe, medical director of the country’s National Institute of Bio-Medical Research. Dr. Peter Stafford had been treating patients at a hospital there when he developed symptoms, Serge, the organization he works for, said in a statement.

Three others employees of Serge were working at the same hospital — including Stafford’s wife — but are not showing symptoms.

False negative Ebola tests delayed the response

Congo has said the first person died from the virus on April 24 in Bunia, and the body was repatriated to the Mongbwalu health zone, a mining area with a large population.

“That caused the Ebola outbreak to escalate,” said Kamba, the health minister.

When another person fell ill on April 26, samples were sent to Kinshasa for testing, according to the Africa Centers for Disease Control.

Samples from Bunia were initially tested for the more common type of Ebola, Zaire, Congolese officials said. They came back negative, said Dr. Richard Kitenge, the Health Ministry Incident Manager for Ebola, and local authorities assumed it was not Ebola.

On May 5, the WHO was alerted of about 50 deaths in Mongbwalu, including four health workers, which prompted further tests. The first confirmation of Ebola came on May 14.

Matthew M. Kavanagh, director of the Georgetown University Center for Global Health Policy and Politics said that because of the false negative tests, “we are playing catch-up against a very dangerous pathogen.”

He criticized the Trump administration’s earlier decision to withdraw from the WHO and make deep cuts in foreign aid — “the exact surveillance system meant to catch these viruses early,” he said.

The U.S. State Department pushed aside criticism on Monday, saying that it sprang into action immediately and has already provided US$13 million in assistance for the response.

Esther Sterk with the Medecins Sans Frontieres aid group told the AP: “The situation is quite worrying and is evolving pretty quickly. It was detected quite late.” But she said that was often the case with outbreaks of Ebola, which has similar symptoms to other tropical diseases.

This is a rare type of Ebola

Ebola is highly contagious and can be contracted via bodily fluids such as vomit, blood or semen. The disease it causes is rare but severe and often fatal.

During a big Ebola outbreak over a decade ago, which killed over 11,000, many got infected while washing bodies during community funerals.

“Ebola is very much a disease of compassion in that it impacts the people who are more likely to be taking care of sick folks,” said Dr. Craig Spencer, an associate professor at the Brown University School of Public Health who survived Ebola more than a decade ago after contracting the disease in Guinea.

The U.S. CDC says it causes fever, headache, muscle pain, weakness, diarrhea, vomiting, stomach pain and unexplained bleeding or bruising.

The severity of the symptoms and the rising caseload are fueling a growing sense of panic in the neighborhoods of Bunia.

“I know the consequences of Ebola, I know what it’s like,” said Noëla Lumo, a resident of Bunia. She previously lived in Beni, a region hit by former outbreaks. When she heard about the latest outbreak, Lumo began making protective masks by hand.

The region already grapples with a humanitarian crisis

Ituri’s Mongbwalu is in remote eastern Congo with poor road networks more than 1,000 kilometres (620 miles) from the capital, Kinshasa.

Eastern Congo long has grappled with a humanitarian crisis and the threat of armed groups that have killed dozens and displaced thousands in Ituri in the past year.

UN staff have been asked to work from home and avoid physical contact and crowded areas, said a Bunia-based UN official, who spoke on condition of anonymity because they were not authorized to speak publicly on the subject.

Ituri has over 273,000 displaced people out of a population of 1.9 million, according to the UN.