WHO has declared the Bundibugyo Ebola outbreak in the Democratic Republic of the Congo and Uganda a public health emergency of international concern, while new cases and an attack on a treatment center underscore the challenge of containing it.

WHO has declared the Bundibugyo Ebola outbreak in the Democratic Republic of the Congo and Uganda a public health emergency of international concern, raising the stakes for one of central Africa’s most serious current disease outbreaks.

The decision, first determined by the WHO Director-General on May 16 and publicly announced on May 17, came as the outbreak continued to spread across eastern Congo and into Uganda. WHO’s latest situation update on May 21 said the DRC had recorded 746 suspected cases and 176 suspected deaths, including 85 confirmed cases and 10 confirmed deaths across both countries.

The outbreak has already moved beyond its initial area in eastern DRC. WHO said confirmed transmission had spread through parts of North Kivu and South Kivu, while the CDC said on May 23 that DRC had also confirmed spread into Ituri, Nord-Kivu and Sud-Kivu provinces.

The emergency designation does not mean the outbreak is a pandemic, but it does signal that WHO considers the risk serious enough to require stronger international coordination, surveillance, tracing and response support. WHO also issued temporary recommendations after its Emergency Committee met on May 22.

Security concerns are adding another layer of difficulty. AP reported on May 23 that an Ebola treatment center in eastern Congo was attacked and burned, and that 18 suspected cases fled the facility. That raises questions about whether the patients were later found, re-triaged or isolated, and whether the attack disrupted contact tracing or safe burial work in the area.

What happens next will depend on whether health teams can contain transmission in the affected provinces, keep treatment centers operating and restore trust in communities where fear and violence can undermine outbreak control. For now, the outbreak remains active and the response is still racing to catch up with its spread.

Revision note

Updated with latest WHO, CDC and AP reporting on outbreak escalation and response challenges.