DR Congo Vaccinates Health Workers Against Ebola as Death Toll Tops 3,600

Health workers in Ituri province, the epicenter of the fastest-growing Ebola outbreak on record, began receiving an Ebola vaccine this week even though it was built for a different strain of the virus than the one now circulating. The rollout reached Bunia, Ituri's provincial capital, on September 19, according to Al Jazeera, as the Democratic Republic of the Congo's confirmed death toll climbed past 3,600.

The vaccine, Ervebo, is licensed against the Zaire strain of Ebola virus, the strain behind the 2018-2020 outbreak in eastern DRC, where Health Minister Samuel Roger Kamba says it was used on a large scale. This year's outbreak is caused by a rarer strain, Bundibugyo virus. The World Health Organization states it plainly: 'Although Ervebo is a safe vaccine, and effective against Ebola virus disease, it is not known whether it provides protection against the Bundibugyo virus in humans.'

Steve Ahuka, an official on the Congolese health task force, put it more bluntly to Al Jazeera: 'We don't know to what degree it might be effective against the Bundibugyo strain.' Health workers are being vaccinated regardless, prioritized because they face the highest exposure risk in the response. Jeannot Elua, a doctor receiving the vaccine in Bunia, called it 'beneficial' and added, 'We healthcare workers don't really have a choice.'

How the outbreak reached this scale

1. February 2026: The Bundibugyo virus first surfaces in DRC, per the World Health Organization.
2. May 15, 2026: DRC health officials formally declare the outbreak.
3. May 17, 2026: The WHO Director-General declares a Public Health Emergency of International Concern.
4. August 11, 2026: The death toll passes 2,000, with more than 4,300 confirmed cases across five provinces.
5. August 22, 2026: The first 16,250 of 70,000 WHO-approved Ervebo doses arrive in the country.
6. August 27, 2026: Vaccination of health workers begins in Kisangani, per WHO's Disease Outbreak News.
7. September 19, 2026: The rollout reaches Bunia, in Ituri province, the outbreak's epicenter.

The outbreak is now the largest Ebola epidemic of any species ever recorded in DRC and only the second documented Bundibugyo virus disease outbreak in the country's history, after a smaller cluster in 2012, according to the WHO. It trails only the 2014-2016 West African epidemic, which killed 11,310 people, among Ebola outbreaks worldwide.

The vaccination plan calls for roughly 50,000 frontline health workers to receive Ervebo, DRC officials say, with 20,000 of them enrolled in a year-long clinical trial built specifically to measure how well the vaccine performs against the Bundibugyo strain. Kamba has described the strategy as a ring approach, moving outward from Ituri into the surrounding provinces.

Paul Hunter, an epidemiologist at the University of East Anglia, told Al Jazeera that animal studies point to possible cross-protection: 'There is some evidence that this vaccine could have some value.' That evidence has not been confirmed in humans. The clinical trial now underway is designed to close that gap, not to assume the answer in advance.