Rare Ebola strain spreads across Congo as global alarm grows

A rapidly growing Ebola outbreak in eastern Democratic Republic of Congo is intensifying international concern as deaths rise, infections spread into new areas and health authorities scramble to contain a rare strain of the virus for which no approved vaccine or treatment currently exists.

The outbreak, caused by the Bundibugyo strain of Ebola, has killed 131 people and expanded to 543 suspected cases, according to figures reported Tuesday. Health officials say the disease circulated undetected for weeks in a densely populated region already burdened by conflict and population movement, creating conditions that have complicated response efforts.

The crisis began in Ituri province and has spread into additional locations, including the city of Butembo, which recently recorded its first cases. Neighboring Uganda has also confirmed infections, adding to fears of wider regional transmission.

The scale and speed of the outbreak have prompted the World Health Organization to raise alarm. WHO Director-General Tedros Adhanom Ghebreyesus expressed deep concern as the agency intensified its response and moved emergency resources into affected areas. Health officials have cautioned that case figures could shift as surveillance, laboratory testing and contact tracing expand.

The outbreak is presenting additional challenges because the Bundibugyo strain differs from the more common Zaire strain of Ebola, against which existing tools have primarily been developed. International health experts have begun discussions on possible vaccine options, while authorities continue evaluating whether available countermeasures could be adapted.

Aid agencies and health workers have increased deliveries of protective equipment and emergency medical supplies into affected regions. WHO said additional shipments of medical materials were being sent to Congo as efforts intensified to determine the full scale of the outbreak and contain transmission.

The outbreak’s international dimension has also widened. One American who contracted Ebola in Congo was being transferred to Germany for treatment, while several others were being monitored after potential exposure. The United States has also mobilized funding and announced plans for additional treatment capacity.

Regional governments have begun implementing precautionary measures, including tightened screening and some border restrictions, although WHO has warned against formal border closures because they could push movements underground and complicate disease monitoring.

Health experts say conflict, displacement and limited healthcare access are increasing risks at a time when health systems are already under strain. The Democratic Republic of Congo has experienced multiple Ebola outbreaks in past decades, but officials and aid workers say the current outbreak’s combination of a rare virus strain and spread into populated areas is creating a particularly difficult challenge.