The Democratic Republic of the Congo reported 3,200 Ebola infections and at least 1,405 deaths as of July 27, 2026. That is a jump of about 1,000 cases in just ten days, making this one of the fastest-growing Ebola outbreaks the country has ever seen Al Jazeera.

The outbreak was officially declared on May 15, 2026. It is caused by the Bundibugyo strain of the Ebola virus. Ebola is a deadly disease that spreads through contact with bodily fluids. There are several strains, and they differ in how dangerous they are and whether treatments exist. The Zaire strain, which caused most past outbreaks in Congo, has an approved vaccine. The Bundibugyo strain does not. Several experimental vaccines are being rushed into testing, and two treatments are in development, but none are ready to use at scale. On July 24, 2026, Oxford University announced that the first group of volunteers had received an experimental vaccine targeting the Bundibugyo strain Al Jazeera.

The numbers have climbed fast. The CDC, reporting through July 22, 2026, documented 2,905 confirmed cases and 1,269 deaths CDC. The CDC also noted that the outbreak passed 1,000 confirmed cases within 40 days of the response starting. Ten days earlier, the WHO recorded 2,124 confirmed cases and 828 deaths as of July 15, with a death rate of about 39 percent WHO. On June 7, Reuters reported just 515 confirmed cases Reuters. The numbers keep going up.

The WHO has said that nearly 90 percent of cases are in Ituri Province, which borders South Sudan and Uganda. The virus is now confirmed in five provinces, including two where it has spread recently Al Jazeera. The outbreak has already crossed borders: Uganda confirmed five cases by May 23 Reuters. On May 17, the WHO declared the outbreak a Public Health Emergency of International Concern, or PHEIC, covering both the DRC and Uganda WHO.

A PHEIC is the WHO's highest-level warning. It tells governments around the world that an outbreak threatens more than one country and needs a coordinated global response. The declaration came just two days after the DRC's outbreak was formally announced, when confirmed cases in Ituri were still in the single digits. As of May 16, the WHO had recorded eight confirmed cases, 246 suspected cases, and 80 suspected deaths in Ituri. The rise from those numbers to 3,200 confirmed infections in about ten weeks means the virus is spreading faster than in any previous Bundibugyo outbreak on record.

Real-world problems are making the outbreak harder to fight. Healthcare workers in the DRC have been striking over unpaid wages, disrupting Ebola response efforts in some hospitals. The UN Humanitarian Air Service is flying medics, response teams, and lab samples to front-line areas, keeping a lifeline going in regions where roads are unreliable or nonexistent Al Jazeera. On July 16, Reuters reported that the US government moved to block Americans in the DRC from immediate travel home, citing the outbreak Reuters.

The broader context here matters for understanding what may come next. Ebola has killed more than 15,000 people across Africa over the past 50 years. But those deaths were mostly caused by the Zaire and Sudan strains, which now have licensed vaccines or treatments in advanced testing. The Bundibugyo strain, first identified in Uganda in 2007, has usually caused smaller outbreaks with fewer cases. The DRC's 17th Ebola outbreak is changing that picture. Without a licensed vaccine, responders cannot use ring vaccination, the strategy that helped stop past outbreaks. In ring vaccination, health workers vaccinate everyone who has been in contact with an infected person, and then the contacts of those contacts, creating a protective ring around the outbreak. Instead, the response relies on contact tracing (finding and monitoring everyone who was near an infected person), isolation, and infection control at health facilities. These measures are being carried out where frontline health workers are unpaid and where conflict makes it hard to reach some areas.

The geography raises its own concerns. Ituri Province shares a porous border with South Sudan and Uganda. The WHO's confirmation that the virus has spread into two new provinces means it could reach population centers farther from the current epicenter, potentially overwhelming areas with limited health infrastructure. South Sudan, in particular, has a fragile health system already under strain from humanitarian crises.

Several factors will shape the coming weeks. The Oxford vaccine trial is in its earliest phase, with no timeline for results or possible emergency approval. The two treatments under development for the Bundibugyo strain are similarly not yet ready. Until a vaccine or treatment reaches the field, the response depends entirely on standard public health measures operating under severe strain. The speed of the last ten days, in which the case count grew by about 1,000, suggests that current containment efforts are not keeping up with the virus. Whether that changes will depend on practical factors rather than scientific ones: resolving the healthcare worker strikes, getting contact-tracing teams into newly affected provinces, and strengthening neighboring countries' ability to detect cross-border cases before new chains of transmission take hold.