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OUTBREAK: Ebola

Ebola Bundibugyo disease in the Democratic Republic of the Congo (2026)

Background

Ebola Disease (EBOD) is potentially lethal zoonotic disease caused by several viruses in the Filoviridae viral family, three of which are known to cause significant outbreaks in humans. The Ebola virus (also known as the Zaire virus) causes Ebola virus disease (EVD), the Sudan virus causes Sudan virus disease (SVD) and the Bundibuygo virus causes Bundibugyo virus disease (BVD). The Ebola virus and Sudan virus were first discovered in 1976 after two almost simultaneous outbreaks occurred in South Sudan and the Democratic Republic of the Congo (DRC), resulting in over 500 cases. The Bundibugyo species was first identified in 2007 in Bundibugyo district in Uganda, during which 131 cases were reported with 42 deaths.  

There have been over 20 outbreaks of Ebola disease in Africa, with the DRC experiencing the most EVD outbreaks, South Sudan and Uganda experiencing the most SVD outbreaks, and the DRC and the Republic of Congo having each experienced one outbreak of BVD. The case fatality rate (CFR) is highest for EVD and is typically over 60%, compared to around 50% for SVD and 30% for BVD, with healthcare workers especially at risk. Symptoms in severe cases include multiorgan failure, haemorrhage, and shock. 

Fruit bats are believed to be a natural host and potential reservoir for the viruses which cause Ebola disease. Transmission to humans occurs through close contact with the blood and bodily fluids of infected animals. Human-to-human transmission occurs through direct contact with the blood and bodily fluids of an infected, symptomatic human or objects they may have contaminated. There is also evidence that sexual transmission can occur after recovery. There are licensed vaccines (rVSV-ZEBOV and Ad26.ZEBOV/MVA-BN-Filo) and monoclonal antibody (Ebanga [Ansuvimab-ZYKL]) and tri-antibody cocktail (Inmazeb [atoltivinab, odesivimab, maftivimab]) therapeutics against Ebola Zaire, but these are not licensed for non-Zaire Ebola viruses.   

Previous to this outbreak, the most recent outbreak of Ebola disease occurred between September and December 2025 in the Kasai Province of the DRC, caused by the Ebola Zaire virus. A total of 64 cases (53 confirmed, 11 probable) and 45 deaths (CFR: 70.3%) were reported throughout the 3 month outbreak. The Ministry of Health of the DRC declared the end of the outbreak on 1 December 2025, after the end of a 42 day countdown since the last case tested negative. At its peak, WHO had assessed the overall public health risk as high at the national level, moderate at the regional level, and low at the global level.  

Outbreak of Ebola Bundibugyo Disease in the Democratic Republic of the Congo

On the 15th May 2026, Africa CDC released a statement reporting an active outbreak of Ebola disease in the Ituri Province of the DRC, with a further statement by the WHO Regional Office for Africa following on the same daySubsequent testing has confirmed Ebola Bundibugyo. As of 18th May, 528 suspected cases and 132 deaths have been reported, indicating a case fatality ratio of around 23. Two cases have been reported in Uganda after travel from the DRC.. 668 contacts have been identified for follow-up in the DRC and Uganda. 

The event was declared a Public Health Emergency of International Concern (PHEIC) by the Director-General of the World Health Organization on 16th May.

Africa CDC have convened an urgent coordination meeting bringing together health authorities from the DRC, Uganda and South Sudan and partners including UN and public health agencies, research funders and pharmaceutical companies, amongst others. The focus of the meeting was stated as “immediate response priorities, cross-border coordination, surveillance, laboratory support, infection prevention and control, risk communication, safe and dignified burials, and resource mobilisation”.

The Filovirus Collaborative Open Research Consortium (CORC) will hold an Emergency Scientific Consultation on Bundibugyo Medical Countermeasures Research & Development on Friday 22 May 2026 from 13.00 to 16.00 CEST 

More information about the Ebola outbreak is provided here.

Key public health and research updates

May 2026:May 2026:

March 2026:

September 2025:

March 2025:

  • Filoviridae CORC meeting held on the update of the WHO-AFIRM Roadmap.

October 2024:

  • WHO published a CORE protocol for testing therapeutic candidates against Filoviruses

July 2024: 

March 2024: 

  • WHO published a CORE protocol for testing vaccine candidates against Filoviruses

August 2022:

  • DRC declared an EVD outbreak in the North Kivu province. 

June 2022:

January 2019:

December 2008:

  • DRC declared an EVD outbreak in the Kasai province.

Outbreak-specific research priorities

The Filovirus Collaborative Open Research Consortium (CORC) will hold an Emergency Scientific Consultation on Bundibugyo Medical Countermeasures Research & Development on Friday 22 May 2026.

In March 2026 a new Roadmap for Filovirus research and development was published updating the previous WHO R&D Blueprint research priorities for Ebola/Marburg published in 2019. The WHO-Strategic Agenda for Filovirus Research and Monitoring (WHO-AFIRM) (2021-2031) was published in 2021, which outlines strategic goals and milestones for Filovirus research under three pillars: Anticipation (to prevent and control outbreaks), Reinforcement (to develop and evaluate vaccines), and Cure (to develop post-exposure therapies). 

Relevant Links

 

Pandemic PACT data

See below our data visualisations for Ebola research grant funding.

Global annual funding for research on diseases with a pandemic potential

3 Global Filters Applied

Total number of grants and US dollars committed for each disease

No data available due to applied filters.

Please note: Grants may fall under more than one disease. Funding amounts are included only when they have been published by the funder and are included within the year of the grant award start date.

Global Distribution of Grants by Research Area

3 Global Filters Applied

The chart shows the total amount of funding allocated for different research areas for all diseases. Use filters on the left for advanced filtering depending on your interests. Use the 'View sub-categories' buttons to explore the sub-categories.

Pathogen: natural history, transmission and diagnostics

4650

$2.71B

Animal and environmental research and research on diseases vectors

446

$285.02M

Epidemiological studies

2235

$1.34B

Clinical characterisation and management

3420

$2.54B

Infection prevention and control

1350

$1.02B

No data available due to applied filters.

Please note: Grants may fall under more than one research category, and funding amounts are included only when they have been published by the funder.

Distribution of Clinical Research Grants by Clinical Trial Phase

3 Global Filters Applied

The chart shows the number of grants awarded and the total funding allocated for clinical research across all diseases, categorized by trial intervention focus. Hover over each stacked bar to see a detailed breakdown by focus. Use the ‘View Categories’ button to explore clinical trial phases in more detail by intervention focus.

Number of grants

  • Pre-clinical studies

    0

  • Phase 1

    0

  • Phase 2

    0

  • Phase 3

    0

  • Phase 4

    0

  • Unspecified phase

    0

Known Financial Commitments (USD)

  • Pre-clinical studies

    $0.00

  • Phase 1

    $0.00

  • Phase 2

    $0.00

  • Phase 3

    $0.00

  • Phase 4

    $0.00

  • Unspecified phase

    $0.00

Note that some clinical research may fall under multiple categories; although, these overlaps are not explicitly shown. For example, phases are displayed with “clinical characterisation” awards where they co-occurred with other interventions. For diagnostic trials, preclinical studies are not included in the data presented. The diagnostics visualisation will soon be updated with a revised classification of diagnostic research awards to better reflect the scope of funded awards.

Global Map of Geographical Distribution of Funding Organisations OR Research Locations

3 Global Filters Applied

The information on the research location was collected where available from the grant application, and can be different to the location of research institution. Click on a country to see country-specific grant information (including joint-funded grants).

Number of Joint Grants

No data available due to applied filters.

Please note: Funding amounts are included only when they have been published by the funder. Some research projects are undertaken in multiple locations (countries). Some are funded by multiple funders, the breakdown of joint-funded projects can be found when selecting a country and 'show joint-funded countries'. Where research location is not explicitly specified the default used is the location of the research institution receiving the funds.

Regional Distribution of Funding by Research Areas

3 Global Filters Applied

Each research category is shown in a different colour

No data available due to applied filters.

Please note: Grants may fall under more than one research category, and funding amounts are included only when they have been published by the funder.

Regional Flow of Research Grants

3 Global Filters Applied

The chart illustrates the flow of research grants by region, tracing it from funder to research institution and ultimately to the location where the research is conducted.

If the full chart is not visible, please scroll horizontally to view.

Total Number of Grants

US Dollars Committed

No data available due to applied filters.

Please note: Funding amounts are included only when they have been published by the funder. Some research projects are undertaken in multiple locations (countries). Where research location is not explicitly specified the default used is the location of the research institution receiving the funds.