DRC Ebola outbreak kills 2,000 as rare Bundibugyo strain spreads faster than ever

The death toll is doubling every three weeks. In the Democratic Republic of Congo, health officials announced Tuesday that a Bundibugyo Ebola outbreak has killed more than 2,000 people since the first confirmed case in May—though researchers now believe the virus was circulating as early as February. The speed is unprecedented. It took nine weeks to reach the first thousand deaths. The second thousand came in just twenty-one days.

Altogether, more than 4,380 infections have been recorded across the eastern and northeastern regions of the country. This is the DRC's seventeenth Ebola outbreak on record, but it is moving faster and killing at a higher rate than any epidemic documented before it. The case fatality rate stands at 45.9 percent—higher than the devastating 2014-2016 West African outbreak, which infected 28,000 people and killed more than 11,000. Sania Nishtar of the Gavi vaccine alliance has warned that this outbreak could become the largest in history.

What makes this strain particularly dangerous is its novelty and the absence of any approved vaccine. The Bundibugyo variant is rare, and while vaccines exist for other Ebola strains, none have been tested or approved for this one. Clinical trials began in early July for two antiviral treatments, and the World Health Organization recommended last Friday that a full-scale human trial begin for Ervebo, a vaccine that has worked against the Zaire strain. But whether it will protect against Bundibugyo remains unknown. Gavi has stockpiled 500,000 doses and made them available for the trial, but authorities are essentially experimenting in real time while the virus spreads.

Researchers from Congo, Uganda, Belgium, and other nations published findings in Nature Medicine on Monday suggesting the outbreak began with an animal-to-human transmission event—a spillover from wildlife—before spreading between people. The virus appears to have mutated from earlier Bundibugyo cases documented in 2007 and 2012. Given the severity, authorities are investigating whether further mutations have occurred.

The DRC's health minister, Samuel Roger Kamba, stated that the peak has not yet been reached. He expects the spread to come under control within three months and then begin declining. But the obstacles are formidable. The country faces a volatile security situation with rebel violence, crumbling infrastructure, and chronic shortages of healthcare workers. Bad roads make it nearly impossible to trace contacts and contain transmission. The WHO's regional director told reporters this week that authorities are "chasing the virus" while "the virus is ahead of us." Jean Kaseya, head of the Africa CDC, warned that contact tracing has fallen well below the WHO's target of tracking 95 percent of potential contacts. Fewer and fewer new cases can be linked back to known patients, meaning the outbreak is spreading through chains that remain invisible to health authorities.

Governments have closed the airport in Ituri Province, the outbreak's epicenter, and restricted public gatherings. But the combination of disease and fighting has already forced the displacement of large populations across the DRC, Rwanda, and South Sudan. The virus transmits through direct contact with bodily fluids and causes a hemorrhagic fever. Over the past fifty years, Ebola has killed more than 15,000 people across Africa. This outbreak, moving at its current pace and with no proven vaccine in hand, represents a crisis that authorities are struggling to contain.