The outbreak is expanding rapidly
The Democratic Republic of the Congo's 2026 Ebola outbreak has become the country's largest on record and is still spreading across eastern and northern areas. Government figures cited on August 28 reported 5,713 confirmed cases and 2,744 deaths, while the number of affected health zones had risen to 60.
The outbreak is caused by Bundibugyo virus, one of the viruses that can produce Ebola disease. It was declared in May after cases were confirmed in the DRC and Uganda. The World Health Organization has described transmission as intense and faster than in previous Ebola outbreaks.
Figures change as laboratories confirm cases and surveillance expands. Readers should use WHO and national health authorities for the newest situation report rather than relying on an old total.
Why Bundibugyo matters
Different Ebola viruses are related but not identical. Vaccines and treatments developed for the more common Zaire ebolavirus cannot simply be assumed to have the same effectiveness against Bundibugyo virus.
That is why the current vaccination campaign is being conducted with careful data collection. The Ervebo vaccine has a strong record against Zaire ebolavirus. WHO advisers recommended prioritising it for a randomised clinical trial in the context of this Bundibugyo outbreak to measure whether it provides useful protection.
Vaccinating frontline health workers can also be part of a broader emergency strategy while evidence is gathered, subject to national and international protocols.
How Ebola spreads
Ebola is transmitted through direct contact with the blood or other body fluids of a person who is sick with or has died from the disease, and through contaminated objects. It is not spread through ordinary casual contact in the same way as many respiratory viruses.
People are not generally infectious before symptoms appear. Common symptoms can include fever, severe weakness, muscle pain, headache, sore throat, vomiting, diarrhoea, rash and, in some cases, bleeding. These symptoms overlap with other diseases, so laboratory testing and professional assessment are essential.
Safe care, infection prevention, contact tracing and dignified burials are central to stopping transmission.
Why containment is difficult
The outbreak spans interconnected health zones across provinces including Ituri, North Kivu, South Kivu, Haut-Uélé, Tshopo and Bas-Uélé. Population movement can carry infection between communities before every contact is identified.
Conflict and displacement complicate access. Health facilities may lack staff, protective equipment, isolation capacity or reliable transport for samples. Misinformation can discourage early reporting, while fear of treatment centres can delay care.
The WHO and Africa CDC response includes surveillance, laboratory testing, clinical care, infection prevention, community engagement and support for neighbouring countries. Central African Republic and South Sudan have been identified among countries at high risk of spillover as cases approach border areas.
What vaccination can and cannot do
Vaccination is one layer of the response, not a replacement for case detection and safe care. In an outbreak caused by a less-studied strain, health authorities must measure effectiveness while deploying available tools ethically.
Ring vaccination, where appropriate, targets contacts and contacts of contacts around a confirmed case. Frontline workers may be prioritised because repeated exposure raises their risk and because protecting the workforce helps the health system continue operating.
Even an effective vaccine takes time to produce immunity. People still need protective procedures, monitoring and rapid testing after exposure.
Advice for travellers and the public
WHO situation updates should guide travel decisions. Most people outside affected areas face low direct risk unless they have relevant contact or health-care exposure. Stigma against Congolese or African communities is harmful and does not prevent infection.
Anyone who has been in an affected area, develops compatible symptoms and may have had exposure should contact local public-health services immediately and describe the travel and contact history before arriving at a clinic. Emergency instructions differ by country.
For more international health reporting, visit our World section. Readers should also consult the WHO Ebola situation page for current official data.
This article is for general information and is not medical advice. Follow public-health instructions in your location.
