DEMOCRATIC REPUBLIC OF THE CONGO / RankWire.AI / – By August 3, Congo’s Ebola outbreak had reached 3,874 confirmed cases and caused 1,751 deaths, marking it as the country’s largest recorded epidemic. It ranks second globally after the 2014 to 2016 West Africa outbreak. Congo reached the milestone of over 1,000 confirmed cases within just 40 days of activating its response measures, a stark contrast to the approximately 235 days it took during the 2018 outbreak. This rapid escalation highlights challenges such as delayed detection, weak surveillance, ongoing conflict, high mobility, and the lack of approved medical tools specific to the strain.
Congo’s Ministry of Public Health announced the outbreak on May 15 after testing identified Bundibugyo virus in Ituri province. The World Health Organization (WHO) first received an alert on May 5, after reports surfaced of a deadly, unexplained illness near Mongbwalu. Subsequent investigations revealed the virus had been circulating for months before officials recognized the outbreak. Initial testing in Bunia did not detect Bundibugyo, as early symptoms were similar to malaria and other common febrile illnesses. This delay in diagnosis allowed infected individuals and contacts to move within communities before effective isolation and contact tracing could be implemented.
The identification of Bundibugyo virus has impacted the response strategies. Vaccines and antibody treatments licensed for Ebola target Zaire ebolavirus, responsible for Congo’s 2018 to 2020 epidemic. However, there are no approved vaccines or specific treatments for Bundibugyo virus disease. As a result, patients rely heavily on early diagnosis, isolation, supportive care, infection prevention, contact tracing, and safe burial practices. WHO has added a Bundibugyo diagnostic test to its emergency list and initiated treatment studies, but these efforts arrived too late to prevent widespread transmission.
Delayed detection hampers contact tracing efforts
The outbreak has expanded from Mongbwalu to encompass 49 health zones across Ituri, North Kivu, South Kivu, Haut-Uele, and Tshopo. Ituri bears the highest number of cases and fatalities, with Bunia, Rwampara, and Mongbwalu among the most severely affected zones. WHO tracked 17,863 contacts by July 30, yet only about three quarters of those contacts received active follow-up in several affected regions. Officials also report that most new infections are occurring outside established contact chains. Surveillance teams are often only identifying new patients after further exposure has taken place.
Ongoing conflict and population displacement further hinder monitoring efforts. Armed attacks have restricted access, disrupted response activities, and caused some health teams to suspend operations. Large numbers of people continue to traverse mining routes, trade corridors, crowded displacement sites, and cross-border pathways. Healthcare facilities face shortages of protective gear, laboratory access, transportation, and trained personnel. As of July 30, Congo recorded 151 infections and 44 deaths among health workers. Front-line staff have also ceased operations in some areas due to delayed or inadequate compensation.
Insecurity and treatment shortages challenge containment efforts
Ebola transmission occurs through direct contact with the blood or body fluids of an infected or deceased individual. It does not spread via casual proximity like influenza. Transmission risk increases in clinics lacking proper infection controls and during burials involving contact with infected bodies. Over 60% of recent fatalities happened outside treatment centers, complicating safe burial procedures and contact investigations. In response, Congo’s health authorities, WHO, and Africa CDC have expanded laboratories, treatment facilities, community outreach initiatives, and border surveillance. Nonetheless, the response lags behind the scale and speed of new cases.
On July 28, Uganda declared its linked Ebola outbreak over after 42 days without a new local case. The single case treated in France did not lead to secondary transmission, and the patient recovered. In contrast, Congo remains the epicenter of ongoing transmission, with a confirmed case fatality rate of approximately 45% in early August. The outbreak’s faster 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 diminishes the tools available to contain the epidemic, unlike earlier Zaire Ebola outbreaks. These combined factors explain the unusually rapid growth in case numbers.