Ebola Outbreak in Congo: Rising Deaths and WHO Emergency Declaration

The World Health Organization (WHO) has declared the ongoing Ebola outbreak in the Democratic Republic of the Congo (DRC) and Uganda a Public Health Emergency of International Concern (PHEIC). The decision, announced by WHO Director-General Tedros Ghebreyesus, follows the detection of the Bundibugyo strain of the virus, which has demonstrated significant cross-border spread and rising infection rates.

While the WHO has categorized the situation as a PHEIC, officials noted that the current outbreak does not meet the specific criteria required to be classified as a pandemic emergency under the International Health Regulations. The declaration highlights the extraordinary nature of the event and the potential risk to international health, though the agency is not currently recommending restrictions on international travel or trade.

Escalating Case Counts and Geographic Spread

The epidemic, which was first reported in the Ituri Province of the DRC on May 15, 2026, has shown rapid progression. According to data released by the WHO, as of May 16, health authorities had recorded eight laboratory-confirmed cases, 246 suspected cases, and 80 suspected deaths within the Ituri Province. These cases were concentrated across at least three health zones: Bunia, Rwampara, and Mongbwalu.

The scale of the outbreak has continued to increase in the days following the initial reports. As of May 18, 2026, reports indicate that more than 100 deaths and at least 395 suspected cases have been recorded. Confirmed cases also rose to 12 as of May 17, 2026.

The virus has already moved beyond the initial epicenter in Ituri. Cases have been confirmed in the DRC’s capital, Kinshasa, and in the North Kivu Province. The outbreak has also crossed into Uganda, with reports of infected individuals traveling from the DRC to Uganda’s capital, Kampala. In Uganda, at least two infected individuals have been admitted to intensive care.

The Challenge of the Bundibugyo Strain

Public health officials have expressed particular concern regarding the pathogen involved: the Bundibugyo ebolavirus. This specific strain presents unique challenges for medical response efforts because existing vaccines and treatments are designed for the Zaire ebolavirus, rather than the Bundibugyo strain.

Currently, there is no approved vaccine or medicine specifically for the Bundibugyo virus, though experimental vaccines have undergone testing on macaques. The virus is estimated to have a fatality rate between 25% and 50%.

This outbreak marks the 17th Ebola outbreak to emerge in the Democratic Republic of the Congo since the disease was first identified in the country in 1976. Previous outbreaks of the Bundibugyo virus occurred in the Bundibugyo District of Uganda in 2007 and 2008, and in Isiro, DRC, in 2012.

Public Health Risks and Humanitarian Context

The WHO has warned that the outbreak is likely larger than currently detected, citing clusters of unexplained deaths, a high positivity rate among tested samples, and a limited understanding of transmission patterns. The risk to healthcare workers is also a significant concern, with at least four deaths among healthcare staff reported, raising questions regarding infection prevention measures in medical facilities.

Several factors are complicating the containment of the virus:

• High Population Mobility: Trade links and high levels of movement in the region increase the risk of the virus spreading to neighboring countries.
• Humanitarian Crisis: Ongoing conflict in the Ituri Province has created a humanitarian crisis, with approximately 1.9 million people in need of assistance.
• Security Challenges: The conflict complicates contact tracing efforts, as healthcare workers have faced attacks and populations remain highly mobile.

Despite these risks, the WHO has urged countries to focus on strengthening surveillance, preparedness, and community engagement rather than implementing travel or trade restrictions. The agency emphasized the importance of ensuring accurate public information to manage the epidemic effectively.