On Sunday, May 17, 2026, the World Health Organization (WHO) took a decisive step by declaring a public health emergency of international concern in response to the Ebola outbreak affecting the Democratic Republic of the Congo (DRC) and now spreading into Uganda. This is the second-highest alert level the WHO can trigger — a strong signal that the international community cannot ignore.

What makes this outbreak especially worrying is the strain involved: the Bundibugyo virus, an Ebola variant for which there is currently no approved vaccine and no specific treatment. This is an unprecedented situation since the major Zaire virus outbreaks of the 2010s, for which effective vaccines were available.

What is the Bundibugyo virus?

The filovirus family includes several Ebola species: Zaire, Sudan, Taï Forest, Reston and Bundibugyo. The latter was first identified in 2007 in the Bundibugyo district of Uganda during an outbreak that killed 37 people. Since then, it had caused only a handful of limited flare-ups, leaving researchers less inclined to develop urgent medical countermeasures.

The fatality rate of the Bundibugyo virus is estimated at around 30% — fearsome, but lower than the 60 to 90% typical of the Zaire strain. This difference in mortality has unfortunately helped push Bundibugyo research into the background. As a result, in 2026, doctors on the ground have only supportive care — rehydration and symptom management — with no targeted antiviral weapon.

The situation on the ground: 246 suspected cases and 80 deaths in Ituri

As of May 16, 2026, the WHO reported eight laboratory-confirmed cases and 246 suspected cases in Ituri province, in eastern DRC. The provisional number of suspected deaths stands at 80 people. These figures are joined by one confirmed case in Kinshasa — the capital, more than 2,000 kilometers from Ituri — and one death in Uganda among travelers who had recently returned from the area.

The spread to Kinshasa and Uganda illustrates the risk of rapid dissemination in densely populated urban areas and through international transport corridors. Ituri is a region already weakened by years of armed conflict, where health services are undersized and distrust of health authorities remains high — fertile ground for uncontrolled spread of the virus.

Why is there no vaccine against Bundibugyo?

Developing a vaccine is a long, costly and risky process. After the Zaire Ebola outbreak in West Africa between 2014 and 2016 — which killed more than 11,000 people — the international community invested heavily in developing the rVSV-ZEBOV vaccine (Ervebo), approved in 2019. This vaccine is effective against the Zaire strain, but not against Bundibugyo.

Vaccine candidates against Bundibugyo exist as prototypes in several laboratories, notably at Johnson & Johnson and in African research institutes. The WHO has indicated that emergency authorization could be considered by the end of May 2026 for an experimental vaccine. But large-scale deployment in a conflict zone such as Ituri is a colossal logistical challenge, regardless of production timelines.

The international response is taking shape

The international emergency declaration makes it possible to speed up emergency funding, facilitate coordination between countries and activate mechanisms for sharing data and medical equipment. The WHO immediately called on the DRC and Uganda to:

• Strengthen epidemiological surveillance and contact tracing
• Improve laboratory capacity to confirm suspected cases
• Secure funeral practices, a major vector of transmission
• Intensify awareness campaigns to fight rumors and community resistance

Teams from the WHO, Médecins Sans Frontières and the Africa Centres for Disease Control and Prevention (Africa CDC) are already deployed on the ground. The United States, France and several European countries have offered logistical and financial support.

Global risk: should people in France be worried?

At this stage, the risk of spread to Europe remains assessed as low by French health authorities. The Ebola virus is not airborne — it requires direct contact with the bodily fluids of a sick or deceased person. Detection protocols in French airports and hospitals have been in place since the 2014 outbreak.

However, the history of Ebola has taught us that no country is truly safe as long as an outbreak is not controlled at its source. The globalization of transport and migration flows make international vigilance essential. Several imported cases of Zaire Ebola were reported in the United States, Spain and the United Kingdom between 2014 and 2016 — all contained thanks to rigorous protocols.

“This outbreak reminds us that Ebola virus diseases do not disappear. They wait in animal reservoirs, ready to re-emerge in forms for which we are insufficiently prepared.” — Dr Tedros Adhanom Ghebreyesus, WHO Director-General, May 17, 2026

What you can do

For the general public in France, the immediate risk is almost zero. But this crisis once again highlights the importance of supporting health systems in low-income countries. Several NGOs — including the Red Cross, MSF and UNICEF — are launching donation appeals to fund the response in Ituri. Staying informed, not spreading false information on social media and supporting international health cooperation are concrete actions within everyone’s reach.

The WHO emergency declaration of May 17, 2026 is a collective alarm bell. The response will need to match the challenge: fast, coordinated and united.