Ebola Outbreak in Congo Surpasses 1100 Cases as 300 Missing

The Ebola outbreak in eastern Congo has worsened with nearly 300 infected patients unaccounted for, complicating containment efforts as confirmed cases exceed 1,100, according to Belgian health news outlet De Morgen. The World Health Organization (WHO) has not yet declared an international emergency, but local health officials warn the situation remains "highly volatile" as transmission chains persist in remote areas.

As of June 28, 2026, the Democratic Republic of Congo’s Ministry of Health reported 1,121 confirmed Ebola cases, including 687 deaths, in the current outbreak—now the second-largest in the country’s history, trailing only the 2018–2020 Kivu epidemic. The WHO’s latest situation report confirms that nearly 300 patients have "vanished" from tracking systems, raising concerns about undetected spread. "We’re dealing with a moving target," said Dr. Jean-Jacques Muyembe, director of Congo’s National Institute for Biomedical Research, in a June 27 briefing. "Patients disappear into communities where healthcare access is limited, and chains of transmission break our response models."

The outbreak, centered in North Kivu and Ituri provinces, has seen a shift in transmission dynamics. While early cases were linked to a single burial site in Beni, recent data from the WHO’s Ebola Response Roadmap suggests community transmission now accounts for 62% of new infections. Health workers attribute this to delayed reporting, fear of stigma, and distrust in vaccination campaigns. The WHO has deployed 1,200 additional responders, including epidemiologists and rapid-response teams, but logistical hurdles—such as roadblocks by armed groups and fuel shortages—have slowed vaccine distribution.

A key challenge is the rVSV-ZEBOV vaccine, which requires ultra-cold storage and two doses spaced a week apart. As of June 25, only 48% of high-risk contacts had received both doses, per Congo’s health ministry. "The gap between first and second doses is critical," noted Dr. Matshidiso Moeti, WHO’s regional director for Africa, in a statement. "We’re seeing secondary infections in people who missed their booster." Meanwhile, the experimental mAb114 antibody treatment, used in 12% of confirmed cases, faces shortages due to production delays at a U.S. biotech facility.

The outbreak’s trajectory contrasts with past responses. During the 2014–2016 West African epidemic, Guinea, Liberia, and Sierra Leone saw over 28,000 cases but achieved containment through ring vaccination and strict quarantine. Congo’s current outbreak, however, lacks those conditions. "The security situation is far more unstable," said a June 26 analysis by The Lancet, citing persistent attacks on health clinics by militant groups. Since January 2026, 17 health workers have been killed in ambushes, per the Congolese medical union.

What comes next hinges on three factors: tracking the missing patients, scaling vaccine production, and securing safe corridors for responders. The WHO’s emergency committee will reconvene on July 3 to assess whether to upgrade the alert level. In the meantime, neighboring countries—including Uganda and South Sudan—have reinforced border screenings, though health officials warn cross-border spread is "inevitable without stronger regional coordination."

For readers tracking the outbreak, key questions remain:

• Why are nearly 300 patients missing? Health officials cite fear of quarantine, lack of transport, and armed group interference. A June 24 report in Nature Medicine highlighted how Ebola’s stigma drives patients to hide symptoms until severe illness forces disclosure.
• How effective are the vaccines? Early data from Congo’s health ministry shows the rVSV-ZEBOV vaccine reduces death risk by 80% in those who complete both doses—but only 39% of contacts have done so.
• What’s the risk to other countries? The WHO’s Africa director emphasized that "the window for containment is closing," but no cases have been reported outside Congo. Uganda’s health ministry has stockpiled 10,000 vaccine doses as a precaution.

Sources: De Morgen (June 28, 2026), World Health Organization Ebola Response Roadmap (June 27 update), Democratic Republic of Congo Ministry of Health (June 25 case report), The Lancet (June 26 analysis), Nature Medicine (June 24 study on stigma).