WHO Declares Ebola Outbreak in DR Congo and Uganda a Public Health Emergency

On May 17, 2026, the World Health Organization (WHO) officially determined that the ongoing epidemic of Ebola disease, specifically caused by the Bundibugyo virus in the Democratic Republic of the Congo and Uganda, constitutes a Public Health Emergency of International Concern (PHEIC). This determination, made under the International Health Regulations (2005), reflects the gravity of the situation in a region facing significant operational challenges.

While the WHO has classified the event as a PHEIC, it explicitly noted that the current epidemic does not meet the specific criteria for a pandemic emergency as defined by international health standards. The classification serves as a formal call to action for international coordination and provides a framework for member states to prepare and respond effectively.

Understanding the Bundibugyo Virus

The current outbreak is driven by the Bundibugyo virus (BDBV), a member of the Orthoebolavirus genus. Unlike the more commonly discussed Ebola virus, there are currently no approved therapeutics or vaccines specifically indicated for the Bundibugyo strain. Because of this, the global response is heavily focused on proven public health interventions rather than medical countermeasures alone.

As of May 22, 2026, the WHO Secretariat has assessed the risk levels for the affected nations:

• Democratic Republic of the Congo: Very High risk.
• Uganda: High risk.

Uganda has reported two confirmed cases, both linked to regions in the Democratic Republic of the Congo where the virus is actively circulating. Crucially, no onward transmission among contacts of these two cases has been documented to date.

Strategic Response and Recommendations

The WHO has issued comprehensive temporary recommendations to help nations manage the risk. These strategies are tiered based on a country’s proximity to the outbreak and the level of documented transmission.

For Affected Nations

The primary focus for the Democratic Republic of the Congo and Uganda involves strengthening the core pillars of epidemic control:

• Coordination: Activating national emergency management centers under high-level government authority.
• Surveillance: Implementing rigorous contact tracing for 21 days following exposure and scaling up RT-PCR laboratory capacity. Note that standard GeneXpert platforms are unable to detect the Bundibugyo virus.
• Community Engagement: Building trust by working with traditional and religious leaders, and addressing cultural barriers to care.
• Infection Prevention: Ensuring health facilities have adequate Personal Protective Equipment (PPE) and training staff on safe triage and waste disposal.
• Safe Burials: Establishing protocols that respect cultural practices while preventing the spread of the virus during funeral rites.

For Bordering and Other Nations

Countries neighboring the affected areas are advised to treat the situation as a health emergency, which includes establishing active surveillance across health facilities and training rapid response teams. For all other countries, the current risk is assessed as “Low.” However, nations are encouraged to remain vigilant by:

• Disseminating BVD case definitions to travel clinics and health practitioners.
• Preparing to manage travelers arriving from affected areas who present with unexplained febrile illness.
• Providing accurate, up-to-date information to the public to minimize the risk of exposure.

Key Takeaways for Global Health

The WHO’s declaration emphasizes that while the situation is serious, it is manageable through systematic, coordinated action. At this time, the WHO does not recommend the suspension of international travel or the denial of entry to travelers and conveyances from affected regions.

Moving forward, the international community is focusing on research and development, including the urgent validation of diagnostic tools and the advancement of clinical trials for potential therapeutics, and vaccines. States are required to report quarterly to the WHO on their progress and challenges in implementing these recommendations, ensuring an adaptive and data-driven response to the epidemic.

Disclaimer: This report is based on official WHO determinations as of May 23, 2026. For the latest technical guidance and case definitions, please refer to the official World Health Organization website.