Médecins Sans Frontières (MSF) confirmed on October 1, 2026, that one of its staff members working on the Ebola response in the Democratic Republic of Congo (DRC) tested positive for Bundibugyo virus disease, a form of Ebola caused by the Bundibugyo virus, according to the organization’s statement and contemporaneous reporting. The infected worker, identified by Dutch authorities as an MSF doctor, was evacuated from the DRC under strict medical protocols coordinated between health authorities in both countries, Reuters reported. The patient was transferred to a specialized isolation unit at Leiden University Medical Center, located approximately 40 kilometers southwest of Amsterdam, for treatment.

The Bundibugyo virus, first identified in Uganda’s Bundibugyo district, is a distinct strain of Ebola virus disease from the more commonly reported Zaire ebolavirus.

MSF withheld personal details of the staff member, including name, nationality, sex, and specific work location, citing medical confidentiality and privacy concerns, the organization said. The group confirmed the case involved a humanitarian worker deployed as part of the international response to the ongoing Ebola outbreak in the DRC. Dutch health officials described the patient as a doctor assisting in efforts to combat the outbreak, according to Reuters.

MSF and news reports referred to the infection as Ebola disease caused by Bundibugyo virus, but neither MSF nor other sources disclosed details about the worker’s symptoms, clinical condition, or prognosis. The organization also did not specify how or when the worker contracted the virus.

The infected MSF staff member’s case emerged amid what has been described as the largest Ebola outbreak ever recorded in the DRC. Reports indicate approximately 8,000 confirmed cases and around 4,000 deaths, although these figures remain subject to revision as suspected cases undergo investigation and records are updated. The outbreak has prompted a broad international response involving national health authorities, the World Health Organization (WHO), MSF, and other humanitarian and medical organizations.

Health workers have been significantly affected during the outbreak. WHO reported 151 confirmed infections among health workers, including 44 deaths and 68 recoveries, as of its August 2026 disease outbreak report. The organization calculated a 29% case-fatality ratio among infected health workers. These infections highlight the occupational risks faced by medical personnel, who may be exposed through direct patient care, handling infectious materials, or breaches in infection-prevention protocols. WHO’s figures encompass health-worker infections across the outbreak and do not specifically pertain to MSF personnel alone.

The evacuation of the infected MSF worker was carried out under strict medical protocols designed to prevent onward transmission and ensure specialized care. MSF coordinated the transfer with health authorities in both the DRC and the Netherlands, the organization said. Dutch health ministry officials confirmed the patient’s admission to a high-level isolation unit at Leiden University Medical Center, a facility equipped to provide specialized treatment while minimizing the risk of further infections, Reuters reported. There have been no official reports of secondary infections linked to the evacuated MSF worker.

MSF’s initial public statement on October 1 confirmed the positive test and the medical evacuation but intentionally omitted identifying and clinical details to protect the staff member’s privacy. Reuters reported on the same day that the worker was being evacuated to the Netherlands, and by October 2, sources confirmed the patient had arrived and been admitted to the isolation unit at Leiden University Medical Center. WHO had previously reported humanitarian workers contracting Bundibugyo virus in the DRC and being medically evacuated to Europe earlier in 2026.

As of the latest reporting, no official sources have disclosed the current condition or outcome of the infected MSF worker. The ongoing outbreak continues to be monitored by international health authorities, with efforts focused on containment, treatment, and protecting frontline medical personnel.

The outbreak was officially declared the Democratic Republic of Congo’s 17th Ebola epidemic on May 15, 2026, following reports of unexplained deaths in Ituri Province earlier that month, according to the Ministry of Health. The World Health Organization (WHO) subsequently designated the outbreak a Public Health Emergency of International Concern on May 16, 2026, citing the rapid spread of the disease and its cross-border transmission to neighboring Uganda.

As of June 27, 2026, the Ministry of Health reported 1,274 confirmed Ebola cases and 360 confirmed deaths, figures corroborated by the European Centre for Disease Prevention and Control (ECDC) in its June 28 situation update.

The ECDC also noted that 502 individuals were hospitalized in isolation due to confirmed infections. The outbreak has primarily affected Ituri Province, which accounts for 1,165 of the confirmed cases and 301 deaths, making it the worst-hit area. The epidemic has since spread to a fourth province in the northeastern region of the country, expanding the number of communities at risk.

The causative agent of the outbreak has been identified as the Bundibugyo virus (BDBV), a rare variant of the Ebola virus. WHO and national health authorities have reported that no approved therapeutics or licensed vaccines currently exist for this strain, complicating efforts to control the epidemic. Clinical management continues in isolation units, with health officials emphasizing the importance of screening and contact tracing to contain the disease. The U.S. Centers for Disease Control and Prevention (CDC) confirmed its involvement in responding to the outbreak and issued guidance advising travelers to monitor their health for 21 days after leaving affected areas and to avoid contact with individuals exhibiting symptoms such as fever, muscle pain, and rash.

The outbreak’s initial detection dates back to early May 2026, when Africa CDC recorded 50 deaths linked to the emerging epidemic by May 5. By May 16, a U.S. CDC health advisory documented 246 suspected cases and 80 deaths, reflecting the outbreak’s rapid escalation within two weeks. WHO briefings highlighted ongoing challenges, including “constant burials” and intense transmission in eastern Ituri, where health workers are intensifying efforts to trace contacts and screen populations.

The epidemic’s geographic spread now encompasses much of northeastern DRC and has crossed into Uganda, affecting both countries. WHO and ECDC reports estimate that nearly 15 million people reside in the affected northeastern region of DRC, underscoring the scale of the population potentially exposed to the virus. Africa CDC has described the situation as involving “active community transmission” and has called for increased surveillance and containment measures.

Comparisons with previous outbreaks indicate that this event is smaller in scale than the 2018–2020 Ebola outbreak in DRC’s North Kivu and Ituri regions, which recorded 3,481 cases and 2,299 deaths. However, the recurrence of Ebola in this corridor highlights the ongoing vulnerability of eastern DRC to such epidemics. Historical data from CDC and WHO confirm that this region has frequently been the epicenter of Ebola outbreaks, often complicated by insecurity and limited access to health services.

International response mechanisms have been activated following the WHO emergency declaration, with clinical trials for potential treatments expected to commence shortly. The CDC has assessed the likelihood of Ebola spreading to the United States as very low based on current epidemiological data and travel patterns. No cases linked to this outbreak have been reported in the United States to date.

Officials caution that the reported figures of 1,274 confirmed cases and 360 deaths may evolve as case investigations, laboratory confirmations, and contact tracing continue. The outbreak remains ongoing, with sustained transmission reported in affected areas of both the Democratic Republic of Congo and Uganda. Public health authorities continue to monitor the situation closely as response efforts intensify.