Ebola illness attributable to Bundibugyo virus, Democratic Republic of the Congo & Uganda

For the reason that final Illness Outbreak Information was revealed on 29 Could 2026, the variety of confirmed instances and deaths have elevated quickly within the Democratic Republic of the Congo and Uganda. In complete, 534 confirmed instances together with 93 deaths (case fatality fee [CFR] 17.4%) have been reported from each nations, whereas a minimum of 17 folks have recovered from the illness.

Determine 1. Distribution of confirmed instances of Bundibugyo virus illness within the Democratic Republic of the Congo and Uganda, as of 6 June 2026 

Democratic Republic of the Congo

Since 29 Could, a further 390 confirmed instances together with 74 confirmed deaths have been reported from the Democratic Republic of the Congo. The rise is partially because of the scale up of testing and diagnostic capacities, enabling testing of the backlog of beforehand collected samples. As of 6 June 2026, a complete of 515 confirmed instances together with 91 deaths (CFR 17.7%) have been reported from the Democratic Republic of Congo. The reported CFR is probably going an underestimation as many deaths that occurred earlier than the outbreak declaration stay below investigation. Thus far, 12 sufferers have recovered. Instances have been reported from 25 well being zones (HZ) from Ituri (17/36 HZ), North Kivu (7/35 HZ) and South Kivu Provinces (1/34 HZ)[1]. Sixteen confirmed instances have been reported amongst well being and care staff to this point.

The outbreak stays concentrated in Ituri Province, which accounts for 94% (487) of confirmed instances. The CFR in Ituri is 15% (74/487); considerably decrease than the CFR in North Kivu which is 64% (16/25). The very best confirmed case numbers in Ituri Province are reported from Bunia (142 instances), Rwampara (98 instances), Mongbwalu (92 instances), and Nyankunde (24 instances) HZ.

As of 6 June, 5040 contacts had been recognized and have been below follow-up throughout Ituri (4118), North Kivu (699), and South Kivu (223) provinces. Of those, 2535 contacts have been adopted up within the final 24 hours, comparable to follow-up charges of 43.2% in Ituri, 82.5% in North Kivu, and 80.3% in South Kivu.

Rising security-related incidents affecting well being amenities have posed extra operational challenges in affected provinces. These circumstances are constraining entry for the response, disrupting surveillance and response actions, and rising the danger of undetected transmission. Such incidents underline the challenges of the context and the significance of working intently with native leaders and communities. 

Bundibugyo virus illness (BVD) is a extreme and infrequently deadly type of Ebola illness attributable to the Bundibugyo virus, one of many Orthoebolavirus species. It’s a zoonotic illness, with fruit bats suspected to be the pure reservoir. Human an infection is assumed to happen by means of shut contact with the blood or secretions of contaminated wildlife, resembling bats or non-human primates, and it subsequently spreads from individual to individual by means of direct contact with the blood, secretions, organs, or different bodily fluids of contaminated people or contaminated surfaces or gadgets. Transmission is especially amplified in health-care settings when an infection prevention and management (IPC) measures are insufficient, and through unsafe burial practices involving direct contact with the deceased.

The incubation interval for BVD ranges from two to 21 days, and people aren’t infectious till symptom onset. Early signs resembling fever, fatigue, muscle ache, headache, and sore throat, are non-specific, which complicates medical analysis and might delay detection. These signs then progress to gastrointestinal signs, organ dysfunction, and in some instances haemorrhagic manifestations. Case fatality charges up to now two BVD outbreaks, reported in Uganda and within the Democratic Republic of the Congo in 2007 and 2012 have been 30% and 50% respectively.

Differentiating BVD from different endemic febrile sicknesses resembling malaria is difficult with out laboratory affirmation utilizing PCR or antigen/antibody-based assays. Management depends on speedy case identification, isolation and care, contact tracing, secure burials, and robust neighborhood engagement, as no authorized vaccines or particular remedies at present exist for BVD.

Well being authorities within the Democratic Republic of the Congo and Uganda, in collaboration with WHO and companions, are implementing complete public well being measures together with implementing the continental response plan, participating donors and mobilizing extra sources to handle essential funding gaps and maintain response operations throughout affected and at-risk areas.

Key response actions additionally embrace interagency coordination and deployment of subject groups, supply of medical provides, strengthening surveillance, rising laboratory capability, an infection prevention and management, the set-up of secure and optimized therapy facilities, danger communication and neighborhood engagement, and analysis on potential medical countermeasures.

For additional details about public well being response actions by the respective Ministry of Well being, WHO, and companions, please confer with the newest state of affairs studies revealed by the WHO Regional Workplace for Africa:  Ebola Bundibugyo Virus Illness Outbreak Democratic Republic of the Congo | Uganda Weekly Exterior Scenario Report 03, Information as of 31 Could 2026 | WHO | Regional Workplace for Africa

On 6 June 2026, WHO reassessed the danger of the outbreak of BVD to include newly obtainable data and the WHO Non permanent Suggestions. The chance for nations sharing land borders with nations with documented Bundibugyo virus (BVDV) detection, as of this report Democratic Republic of the Congo and Uganda, has been separated out from the danger for different nations within the African Area.

The chance within the Democratic Republic of the Congo stays assessed as very excessive as a consequence of ongoing transmission and the continued enlargement of the outbreak into new well being zones, rising the potential for additional nationwide and regional unfold.

The chance in Uganda remains to be assessed as excessive as a consequence of confirmed cross-border unfold by means of imported instances and ongoing epidemiological hyperlinks alongside the japanese Democratic Republic of the Congo–western Uganda hall, traditionally affected by Ebola outbreaks, together with Bundibugyo and Sudan virus illness outbreaks.

The chance for nations with land borders adjoining nations with documented BDBV detection, is assessed as excessive as a consequence of sustained inhabitants mobility linked to cross-border commerce and mining actions, variation in capacities and expertise of BVD response and variable ranges of readiness.

The chance for the remainder of the Africa area and on the international stage is assessed as low.

WHO advises in opposition to any restriction of journey to, or commerce with, the Democratic Republic of the Congo or Uganda based mostly on the at present obtainable data. WHO continues to intently monitor and, the place mandatory, confirm journey and commerce measures in relation to this occasion.

For additional data on the issues for implementing border well being and worldwide travel-related short-term suggestions, please see the related technical be aware issued on 26 Could 2026

The short-term suggestions issued to State Events on 22 Could 2026 underscore the significance of coordinated outbreak management, enhanced cross‑border collaboration, and sustained surveillance and preparedness to stop additional regional unfold and guarantee an efficient public well being response.

WHO has convened a number of technical advisory teams, together with the Strategic Advisory group of Consultants (SAGE) to evaluate candidate vaccines and therapeutics for BVD. Key suggestions made can be found within the information launch revealed on 28 Could 2026.

Common Data merchandise on the outbreak of BVD in Democratic Republic of the Congo