DEMOCRATIC REPUBLIC OF THE CONGO / RankWire.AI / – The health authorities in Congo have reported that the ongoing Ebola outbreak is expanding at an unprecedented rate compared to previous outbreaks in the country. By August 3, 3,874 confirmed cases and 1,751 deaths had been documented, making it the largest Ebola epidemic in Congo’s history and the second-largest globally. The country reached a milestone of 1,000 cases within just 40 days of initiating its response efforts. In contrast, a significant outbreak starting in 2018 took about 235 days to surpass that number.
Health officials announced the outbreak on May 15 after laboratory tests identified Bundibugyo virus in Ituri province. Subsequent investigations revealed that infections had already begun months earlier near Mongbwalu. Early symptoms in many patients resembled malaria and other common illnesses, leading to initial testing that mainly focused on the better-known Zaire Ebola strain. This delayed detection allowed the virus to spread extensively within households, clinics, mining sites, and trading communities before testing and isolation efforts intensified.
The presence of the Bundibugyo strain has also restricted the availability of medical countermeasures. Vaccines and antibody treatments approved for Ebola target the Zaire ebolavirus, responsible for Congo’s 2018-2020 outbreak. Currently, there are no licensed vaccines or proven specific therapies for Bundibugyo virus disease. Medical teams depend on rapid testing, patient isolation, supportive care, infection control, and safe burials. Although the World Health Organization has supported expanding diagnostic capacity and conducting treatment research, these actions only commenced after the virus had already spread to several regions.
Delayed detection hindered contact tracing efforts
The virus has extended beyond Mongbwalu into numerous health zones across eastern and northeastern Congo. While Ituri remains the epicenter, cases have also been reported in North Kivu, South Kivu, Haut-Uele, and Tshopo. By July 30, response teams had monitored 17,863 contacts, but follow-up remained inconsistent, especially in insecure areas and regions with challenging terrains. Moreover, many new patients were identified outside existing contact lists, indicating gaps in surveillance and that not all transmission chains have been uncovered.
Ongoing conflict has further complicated efforts to find cases and care for patients. Armed attacks have blocked roads, disrupted health operations, and caused some teams to halt fieldwork temporarily. The high mobility of populations—moving between mining operations, markets, towns, and displacement camps—hampers consistent daily monitoring of exposed contacts. Healthcare facilities face shortages of protective gear, trained personnel, transportation, and laboratory services. As of July 30, Congo reported 151 infections and 44 deaths among health workers, adding strain to an already overwhelmed response system.
The spread accelerates due to vaccination gaps and insecurity
Ebola transmission occurs mainly through direct contact with blood or bodily fluids of infected individuals. This risk intensifies in homes, clinics, and during burial practices lacking proper infection control. Over 60% of recent fatalities happened outside healthcare facilities, complicating efforts for safe burials and contact investigations. The World Health Organization, Congo’s health ministry, and Africa CDC have expanded laboratories, treatment sites, border checks, and public information campaigns. Nonetheless, these measures are still struggling to keep pace with the rapid and widespread nature of new infections.
Uganda successfully contained its linked Ebola outbreak on July 28 after 42 days without new local cases. France also announced no secondary transmission from its single treated case. However, Congo remains the primary zone of ongoing transmission, with a death rate approaching 45% as of early August. The epidemic’s speed is heightened by delayed detection and the absence of strain-specific vaccines and treatments. Factors such as untracked contacts, ongoing conflict, staffing shortages, and population movements have contributed to the rapid spread. These combined challenges set this Bundibugyo outbreak apart from earlier Ebola episodes in Congo.