Health authorities reported 550 confirmed cases as of Sunday, including 101 deaths and 19 recoveries, according to the latest situation update released late Monday. The outbreak was officially declared on May 15.

The vast majority of infections have been recorded in Ituri province, which accounts for more than 90 percent of confirmed cases. Additional cases have been identified in North Kivu and South Kivu provinces, while the virus has also crossed into neighboring Uganda.

Officials believe the true number of infections may be higher because the outbreak was detected weeks after transmission had already begun. Response efforts have been further complicated by the absence of an approved vaccine or treatment for the strain responsible for the current outbreak.

The outbreak has been linked to the rare Bundibugyo strain of Ebola virus, for which no approved vaccine or therapeutic treatment currently exists. This differs from the Zaire strain, which was responsible for most of Congo’s previous Ebola outbreaks and for which vaccines and treatments have been developed.

Authorities said the sharp increase in confirmed infections partly reflects expanded diagnostic capacity, which has enabled laboratories to process a backlog of previously collected samples.

Health workers operating in affected areas continue to face significant obstacles. Medical teams have been attacked on multiple occasions by residents frustrated by the outbreak response, while persistent skepticism among some communities has complicated surveillance and containment efforts.

Security concerns remain a major challenge across eastern Congo, where numerous armed groups continue to operate. Ongoing violence has limited access to several affected communities and disrupted disease-monitoring activities.

The World Health Organization said Monday that insecurity is restricting access for response teams, hindering surveillance operations and increasing the risk that new chains of transmission could go undetected.

The agency said the attacks on health personnel underscore the difficulties of responding to a public health emergency in conflict-affected areas and highlighted the importance of cooperation with local leaders and communities.

Eastern Congo has experienced repeated outbreaks of Ebola over the past decade, but health officials warn that the combination of armed conflict, delayed detection and the lack of approved medical countermeasures for the Bundibugyo strain presents a particularly complex challenge for containment efforts.

Speaking at the opening of the facility in Ituri province, Tedros said four patients would be discharged on Sunday, while another had left care two days earlier, highlighting signs of progress in combating the Bundibugyo strain of Ebola, a rare variant for which no approved vaccine or specific treatment currently exists.

“Of course, we’re still working on vaccines and treatments but that doesn’t mean that people cannot recover from Ebola,” Tedros said.

The announcement follows confirmation by the WHO on Friday of the first documented recovery of a patient infected with the Bundibugyo virus during the current outbreak, a development health officials hope will encourage infected individuals to seek medical attention sooner.

According to the latest official figures released by the WHO, the outbreak has generated 906 suspected cases and 223 suspected deaths in Congo. The disease has also crossed borders, with neighboring Uganda reporting nine confirmed cases and one death, according to the Ugandan Health Ministry.

Despite the opening of new facilities and the arrival of additional international assistance, humanitarian organization Doctors Without Borders, known by its French acronym MSF, warned on Saturday that the virus continues to outpace containment efforts. The group called for expanded testing capacity, faster deployment of health personnel and uninterrupted access for medical supplies.

Health authorities have faced growing operational challenges as some local communities resist strict disease-control measures, particularly protocols governing the handling and burial of Ebola victims. Officials say at least three attacks have been carried out against health centers during the outbreak.

Tedros emphasized the importance of community cooperation, urging residents to seek treatment immediately after symptoms appear and to participate actively in containment efforts.

“If you come to health facilities when you have symptoms, you can get the support and recover,” he said, adding that early intervention remains critical to improving survival rates.

Security concerns have further complicated the response. In Ituri, attacks by the Allied Democratic Forces, an armed group linked to Daesh, along with violence involving ethnic militias, have limited access to some affected communities and disrupted medical operations.

The outbreak has also been reported in the eastern provinces of North Kivu and South Kivu, where Rwanda-backed M23 rebels control several strategic urban centers, including Goma and Bukavu. The rebel movement has reported two Ebola cases in areas under its control.

Congolese health officials sought to reassure residents that the outbreak can be contained. Pierre Akilimali, incident manager at the National Institute of Public Health, said symptomatic treatment was producing encouraging results and helping patients recover.

Medical staff at the new treatment center echoed that assessment. Davin Ambitapio, a physician involved in the response, said healthcare workers remained optimistic that coordinated efforts by national authorities and international partners would eventually bring the outbreak under control.

The Bundibugyo strain was first identified in Uganda in 2007 and is one of several known Ebola virus species capable of causing severe hemorrhagic fever outbreaks in humans.

The attack occurred in Rwampara, near the epicenter of the outbreak in Ituri Province, where local youths stormed and burned parts of a treatment facility after a man believed to have died from Ebola was denied a traditional funeral, according to witnesses and police officials.

Authorities said the confrontation stemmed from public resistance to emergency burial protocols designed to prevent transmission of the highly contagious virus.

Under outbreak regulations, suspected Ebola victims must be buried by trained teams because bodies can remain infectious and contribute to further spread.Deputy Senior Commissioner Jean Claude Mukendi, head of public security in Ituri Province, said relatives and friends of the deceased attempted to take the body home despite official restrictions. Police intervened but were unable to prevent the unrest.

Witnesses reported that aid workers evacuated the facility as protesters entered the center and set fire to equipment and structures. Humanitarian organization ALIMA, which operates at the site, later said calm had been restored and medical teams had resumed their work.

The incident highlights the growing challenges facing Congolese authorities and international aid agencies as they confront an outbreak that the World Health Organization has designated a public health emergency of international concern.Health officials reported 671 suspected cases and 160 suspected deaths across two provinces as of Thursday.

The outbreak has also crossed borders, with neighboring Uganda reporting cases, including at least one death.The WHO and regional health authorities have warned that the true scale of the outbreak is likely significantly larger than official figures indicate. Surveillance efforts are continuing as investigators seek to identify additional infections and trace transmission chains.

The outbreak is centered in Ituri Province, a region affected by chronic insecurity, weak healthcare infrastructure and large-scale population displacement. More than 920,000 internally displaced people are living in the province, according to United Nations estimates, complicating disease surveillance and response efforts.

Health experts say the Bundibugyo strain responsible for the outbreak presents additional challenges because no approved vaccine or specific treatment is currently available. Officials estimate it could take at least six to nine months before a vaccine becomes available.The virus has now spread beyond Ituri and North Kivu provinces.

On Thursday, authorities reported the first confirmed cases in South Kivu Province, including a death near the city of Bukavu, approximately 500 kilometers south of the outbreak’s center.The disease circulated undetected for weeks after the first known fatality in late April, partly because initial investigations focused on more common Ebola strains previously seen in the country.

Health authorities have yet to identify the outbreak’s first infected patient.The escalating crisis has begun to affect international travel and regional events. India and the African Union announced the postponement of the India-Africa Forum Summit scheduled for next week in New Delhi, citing the evolving health situation in parts of Africa.

The United States has also imposed screening measures and travel restrictions for individuals recently arriving from affected countries.

Ebola spreads through direct contact with bodily fluids and can cause fever, vomiting, diarrhea, muscle pain and severe hemorrhagic symptoms.

Public health officials say rapid detection, isolation and community cooperation remain critical to containing the outbreak.

The WHO said the outbreak did not yet meet the threshold for a pandemic emergency but warned that countries bordering Congo faced a heightened risk of further spread as infections expanded across eastern regions and new cases emerged in Uganda’s capital, Kampala.

According to the agency, 80 suspected deaths, eight laboratory-confirmed cases and 246 suspected infections had been reported as of Saturday in Congo’s Ituri province, particularly in the health zones of Bunia, Rwampara and Mongbwalu.

The Congolese health ministry had earlier confirmed that at least 80 people had died in the outbreak, which health officials believe may be significantly larger than currently documented because of high positivity rates in early testing and increasing numbers of suspected infections.

The outbreak involves the Bundibugyo strain of Ebola virus disease, a rarer variant for which no approved vaccines or targeted therapeutics currently exist, unlike the more common Ebola-Zaire strain that has been the focus of previous immunization campaigns in Central Africa.

The WHO described the situation as “extraordinary,” warning that international transmission had already been documented.

In Kampala, two unrelated laboratory-confirmed Ebola cases, including one death, were identified on Friday and Saturday in travelers arriving from Congo, according to the agency. A confirmed case was also detected in Kinshasa involving a traveler returning from Ituri province.

The WHO urged governments to activate national emergency-response systems, intensify border screening and strengthen surveillance along internal transportation routes to contain further spread.
The agency also advised that confirmed Ebola patients and close contacts should avoid international travel except for medical evacuation purposes.

It recommended immediate isolation of confirmed cases, daily monitoring of contacts and restrictions on domestic travel for exposed individuals until 21 days after potential infection.

At the same time, the WHO cautioned governments against shutting borders or imposing sweeping trade restrictions, warning that such measures could push movement across unofficial crossings beyond the reach of health monitoring systems.

The outbreak poses an additional challenge for regional health systems already strained by conflict, population displacement and limited medical infrastructure in eastern Congo, where previous Ebola epidemics have repeatedly tested emergency response capacities.

The assault occurred in Bafwakoa village in Mambasa territory of Ituri province, near the town of Niania, beginning around 7 p.m. local time, according to army statements and local authorities.

The Congolese military said the attackers were members of the Allied Democratic Forces (ADF), an armed group active in eastern Congo that has been recognized by Islamic State as an affiliate.

Local official Christian Alimasi said the attackers burned at least 44 houses, killed residents using machetes and fire, and abducted two people during the raid.

Violence linked to the ADF has intensified in recent months in Ituri and neighboring North Kivu province, despite joint military operations launched in 2021 by Congolese and Ugandan forces to counter the group.

Data from Insecurity Insight shows the ADF accounted for roughly a quarter of reported violence against civilians in eastern Congo between 2020 and 2025, underscoring the persistent security challenges in the region.