Health authorities in central Africa are struggling to contain an Ebola outbreak caused by the Bundibugyo virus strain, a less common variant for which no licensed vaccine or targeted treatment currently exists.
According to the latest data from the US Centers for Disease Control and Prevention as of May 31, the Democratic Republic of the Congo has recorded at least 282 confirmed cases and 42 confirmed deaths, while neighboring Uganda reports 9 confirmed cases and 1 death. The World Health Organization’s figures, which track a narrower definition of confirmed cases, stand at roughly 130 confirmed cases and 18 deaths across both countries. The discrepancy between the two agencies reflects differences in reporting timelines and the inclusion of probable versus strictly laboratory-confirmed infections.
The outbreak was officially confirmed by Congolese health authorities on May 15, after several weeks of undetected spread in Ituri province. The WHO declared it a public health emergency of international concern two days later, citing the risk of regional transmission and the challenges of containing the Bundibugyo strain.
Unlike the Zaire strain of Ebola, which has been the focus of most diagnostic and vaccine development, Bundibugyo virus requires specialized laboratory testing for confirmation. This delays identification of new cases and complicates contact-tracing efforts.
WHO Director-General Tedros Adhanom Ghebreyesus visited treatment facilities in Bunia, the capital of Ituri province, in late May, where he opened a new treatment center. He emphasized that early supportive care, including fluid replacement and monitoring, can significantly improve survival chances.
The response effort faces multiple obstacles. Eastern DRC has been affected by armed conflict for years, and attacks on health facilities have been reported in several health zones. Poor road infrastructure and population displacement further hinder the delivery of medical supplies and the tracking of potential contacts.
An American healthcare worker who contracted the virus while treating patients in the DRC has been transported to Germany for care and is reported to be in stable condition. Neighboring countries have increased border surveillance, and the United States has implemented enhanced entry screening for travelers from the affected region. The CDC has assessed the risk to the American public as low but is preparing healthcare systems nationwide for potential cases.