DRC Ebola outbreak poised to become deadliest on record, WHO warns

The Democratic Republic of Congo is losing a race against time. As of mid-August, an Ebola outbreak that began months before anyone officially recognized it had killed 2,214 people and infected 4,727 more. The World Health Organization's director-general, Tedros Adhanom Ghebreyesus, delivered a stark assessment: unless authorities dramatically accelerate their testing, contact tracing, and isolation efforts, this outbreak will surpass the deadliest Ebola epidemic in recorded history—the 2014-to-2016 West African crisis that claimed at least 11,308 lives.

What makes this moment so precarious is not just the absolute numbers but the velocity. The current outbreak reached 250 deaths in 37 days. The West African epidemic took 78 days to hit that threshold. A smaller DRC outbreak from 2018 to 2019 needed 130 days. The virus is moving faster than any previous strain has moved, and health authorities are perpetually playing catch-up. Researchers now believe the outbreak actually began two or three months before its official declaration on May 15, with cases of malaria and typhoid diagnosed in February likely having been Ebola all along. When the first suspected cases surfaced in Bunia, Ituri's capital, in late April, the testing kits on hand were designed to detect only the Zaire strain—the virus responsible for the West African epidemic. The samples came back negative. By the time authorities obtained the correct diagnostic tools for the Bundibugyo strain now circulating, a backlog of untested samples and a shortage of chemical reagents had already created dangerous delays in isolation and treatment.

But the real crisis is invisible. In July, more than 80 percent of new cases presenting for treatment could not be linked to known contact lists. This means the majority of infections are happening in the community, beyond the reach of tracers and outside the knowledge of health authorities. The virus is spreading through networks that do not yet exist on any official map. Many of the deaths are occurring outside treatment centers, in homes and villages, where bodies are handled unsafely and traditional funeral practices—days-long ceremonies in which family members wash, dress, and cry over the deceased—become vectors for transmission. When health workers attempt to conduct safer burials, they are sometimes attacked by locals who believe Ebola is a hoax designed to extract money or caused by witchcraft rather than a pathogen.

The health system itself is collapsing under the weight. Public health workers in the DRC are woefully under-resourced and many have gone unpaid for months, leading to strikes that further cripple the response. In Bunia, where the medical infrastructure is most visible, many workers lack basic protective equipment. Dozens of health workers have already died, and each infection in a healthcare setting forces the facility to close for deep cleaning. Outside of the cities, the situation is far worse. The DRC's northeast is gripped by an ongoing civil war involving dozens of armed groups, including Rwanda-backed M23 rebels and Islamic State-linked forces. Militia checkpoints dot damaged roads connecting thousands of small villages. Government health workers are viewed with suspicion, and when they are allowed access to infected communities, treatment clinics are sometimes attacked.

Mass movement compounds every problem. The DRC has one of the world's largest populations of internally displaced people, and about 900,000 from Ituri province alone are living in refugee camps after fleeing violence. Many workers travel between small-scale, largely unlicensed gold mines across the region to support their families, making them reluctant to isolate or engage with health authorities. Before the outbreak, up to 600 Congolese refugees per day were crossing into Uganda; that flow has not diminished since the epidemic was declared. Cases have now been confirmed in Uganda, and Mercy Corps revealed that cases had been detected in three Congolese cities along a major northern travel corridor into South Sudan—a country already on the brink of civil war with inadequate health infrastructure of its own. The WHO is advising neighboring countries not to close their borders, fearing that travel restrictions could encourage clandestine crossings and discourage case reporting. Yet the outbreak itself is now driving waves of people to flee the hardest-hit areas, creating a vicious cycle.

The virus itself presents an unusual threat. The Bundibugyo strain circulating in the DRC replicates more slowly than the Zaire or Sudan strains, meaning it takes longer to overwhelm the immune system after infection. This is good news for individual patients—they have a better chance of reaching treatment before their condition deteriorates. It is potentially catastrophic for society. Patients remain sick enough to spread the virus through the community for an extended period while still mobile enough to travel. The virus has earned the nickname "walking Ebola." The current outbreak's case fatality ratio sits at about 46.8 percent, higher than some recent Sudan strain outbreaks, though researchers expect this figure to decline as detection improves and conditions stabilize. There is no approved vaccine for the Bundibugyo strain, though human trials of an Oxford candidate have begun, with fourteen people having received the jab so far.

The WHO expects the outbreak to peak in about six months under a moderate scenario. But that timeline assumes authorities can identify and interrupt the hidden transmission chains now driving the epidemic—a task that grows more difficult each day the virus spreads beyond known networks. With 900,000 displaced people, armed conflict blocking access to villages, health workers under attack, and cases already crossing international borders, the conditions for containment are deteriorating faster than the response can scale up.