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, marking the largest epidemic recorded in the country. It is only surpassed globally by the 2014 to 2016 West Africa outbreak. Congo hit the milestone of 1,000 confirmed cases within 40 days of launching its response efforts. In contrast, Congo’s 2018 outbreak took approximately 235 days to reach the same number. This swift escalation highlights issues such as delayed detection, inadequate surveillance, ongoing conflict, high mobility, and the lack of approved strain-specific medical countermeasures.
Congo’s Ministry of Public Health announced the outbreak on May 15 after testing confirmed Bundibugyo virus in Ituri province. The WHO was alerted on May 5 following reports of a deadly, unexplained illness near Mongbwalu. Further investigations revealed that the virus had been circulating for months before officials recognized the outbreak. Initial tests in Bunia did not identify Bundibugyo, and early symptoms mimicked malaria and other common febrile illnesses. This delay enabled infected individuals and contacts to move across communities before isolation and contact tracing could be effectively implemented.
The emergence of the Bundibugyo virus also altered the available response strategies. While licensed Ebola vaccines and proven antibody therapies target Zaire ebolavirus — responsible for Congo’s 2018 to 2020 epidemic — there are no approved vaccines or specific treatments for Bundibugyo virus disease. Consequently, patient management relies on early detection, isolation, supportive care, infection prevention, contact tracing, and safe burials. The WHO has included a Bundibugyo diagnostic test in its emergency list and has initiated treatment studies, but these measures arrived after widespread transmission had already occurred.
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. Ituri bears the highest number of infections and fatalities, with Bunia, Rwampara, and Mongbwalu being among the most severely affected areas. WHO reported tracking 17,863 contacts by July 30, yet only approximately 75% of these contacts received active follow-up in several affected regions. Officials also note that the majority of new cases are emerging outside previously identified contact chains. Surveillance teams are often only locating many patients after additional exposures have occurred.
Ongoing conflict and population displacement complicate surveillance efforts. Armed attacks have limited access, disrupted response activities, and caused some health teams to suspend operations. The extensive movement of people through mining routes, trade corridors, crowded displacement sites, and across borders sustains the spread. Additionally, health facilities face shortages of protective gear, laboratory capacity, transport, and trained personnel. As of July 30, Congo reported 151 infections and 44 deaths among healthcare workers. Front-line workers have also halted work in certain locations due to delayed or insufficient pay.
Conflict and gaps in treatment capacity hinder containment efforts
Ebola transmits through direct contact with the blood or body fluids of infected or deceased individuals. It does not spread through casual proximity like influenza. Transmission intensifies in clinics lacking robust infection control practices and during burials involving contact with infected bodies. Over 60% of recent fatalities occurred outside of treatment centers, complicating safe burial procedures and contact investigations. In response, Congo’s health authorities, WHO, and Africa CDC have expanded laboratory testing, treatment facilities, community engagement, and border surveillance. Nevertheless, these efforts still lag behind the pace and scale of new cases.
Uganda declared its linked outbreak over on July 28 after 42 days without a new locally transmitted case. The single case treated in France did not lead to secondary transmission, and the patient recovered. Meanwhile, Congo remains the epicenter of ongoing transmission, with a confirmed case fatality rate near 45% in early August. The rapid spread is attributed to late detection, incomplete contact tracing, and limited access due to insecurity. The absence of approved vaccines and treatments for Bundibugyo virus eliminates tools that previously helped contain Zaire Ebola outbreaks. These combined factors account for the unusually swift increase in cases.