DEMOCRATIC REPUBLIC OF THE CONGO / RankWire.AI / – As of August 3, Congo’s Ebola outbreak has reached 3,874 confirmed cases and 1,751 deaths, making it the largest epidemic recorded in the country. It ranks second globally only after the 2014 to 2016 West Africa outbreak. Congo reached 1,000 confirmed cases within 40 days of activating its response measures, whereas the 2018 outbreak took approximately 235 days to hit the same milestone. This rapid increase highlights issues such as delayed detection, insufficient surveillance, ongoing conflict, high mobility, and the lack of approved strain-specific medical interventions.
Congo’s Ministry of Public Health announced the outbreak on May 15 after testing confirmed Bundibugyo virus in Ituri province. The World Health Organization (WHO) was alerted on May 5 following reports of a deadly, unexplained illness around Mongbwalu. Investigations later revealed that the virus had been circulating for months before officials recognized the outbreak. Initial tests conducted in Bunia failed to identify Bundibugyo, as early symptoms mimicked malaria and other common febrile illnesses. This delay allowed infected individuals and contacts to move across communities before isolation and contact tracing could be expanded.
The presence of the Bundibugyo virus also changed the available response options. Vaccines and antibody treatments licensed for Ebola target Zaire ebolavirus, which caused Congo’s 2018 to 2020 epidemic. No approved vaccines or specific treatments are available for Bundibugyo virus disease, so affected patients depend on early diagnosis, isolation, supportive care, infection prevention measures, contact tracing, and safe burial practices. The WHO has added a diagnostic test for Bundibugyo to its emergency list and initiated treatment research, but these efforts came too late to prevent widespread transmission.
Delayed detection hampers contact tracing efforts
The outbreak has expanded from Mongbwalu to 49 health zones across Ituri, North Kivu, South Kivu, Haut-Uele, and Tshopo, with Ituri experiencing the highest number of cases and deaths. Among the most affected health zones are Bunia, Rwampara, and Mongbwalu. By July 30, WHO had identified 17,863 contacts, but only approximately three-quarters of them received active follow-up in several impacted provinces. Officials also report that most new infections occur outside known contact chains, with surveillance teams discovering many patients only after further exposure has taken place.
Ongoing conflict and population displacement complicate surveillance activities. Armed attacks have limited access, disrupted response operations, and caused some health teams to halt activities temporarily. The movement of people along mining routes, trade corridors, crowded displacement sites, and across borders sustains transmission. Additionally, health facilities face shortages in protective equipment, laboratories, transportation, and trained personnel. As of July 30, Congo reported 151 infections and 44 deaths among healthcare workers. Frontline staff have also ceased working in some locations due to delayed or insufficient compensation.
Conflict and treatment shortages hinder containment efforts
Ebola transmits through direct contact with the blood or body fluids of infected individuals or the deceased, not via casual proximity like influenza. Transmission increases in clinics lacking proper infection control and during burials involving contact with infected bodies. Over 60% of recent deaths occurred outside treatment centers, complicating safe burial procedures and contact tracing. In response, Congo’s health authorities, WHO, and Africa CDC have expanded laboratories, treatment centers, community outreach, and border surveillance. Despite these efforts, the response still lags behind the scale and speed of new cases.
Uganda ended its linked Ebola outbreak on July 28 after 42 days without a new local case. The case treated in France did not lead to secondary infections, and the patient recovered. Congo remains the epicenter of ongoing transmission, with an early August case fatality rate of approximately 45%. The outbreak is expanding more rapidly due to late detection, incomplete contact tracing, and limited access caused by insecurity. The lack of approved vaccines and treatments for Bundibugyo virus eliminates key tools that previously helped control Zaire Ebola outbreaks, contributing to the unprecedented speed of case growth.