Ebola outbreak: American doctor infected while treating patients in Congo; 6 others exposed as testing delays mar response

An American physician has contracted a rare, highly lethal strain of the Ebola virus while treating patients in the eastern Democratic Republic of Congo (DRC). The infection, along with the direct exposure of at least six other Americans, has led to an international medical emergency.

Following the surge in casualties, the World Health Organization (WHO) officially declared the outbreak, caused by the Bundibugyo ebolavirus variant, a Public Health Emergency of International Concern (PHEIC).

Infection on the frontlines

Medical authorities confirmed that Dr Peter Stafford, an American physician deployed with the Christian mission organisation Serge, tested positive for the virus in Bunia, the capital of the conflict-ridden Ituri province. Stafford had been actively caring for patients at a local hospital when he developed aggressive symptoms. He is currently being medically evacuated to Germany for specialised biocontainment treatment.

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Health data indicates that at least six other Americans faced direct exposure alongside Dr Stafford. Three are classified as "high-risk contacts," and at least one has already become symptomatic and isolated. Among those under strict monitoring is Dr Stafford’s wife, who was also working at the facility.

Why the alarm was delayed

As international medical teams rush to establish emergency isolation tents, investigators have traced the rapid spread of the virus back to a critical technical failure in the DRC's testing pipeline.

The first casualties surfaced on April 24, yet a public health emergency was not declared until mid-May. Local provincial laboratories initially screened blood samples exclusively for the Zaire ebolavirus—the most common strain responsible for past major epidemics.

Believing the Zaire strain was absent, local officials misdiagnosed the rising death toll as an anomalous tropical fever, losing weeks of vital contact-tracing time. The truth only emerged after samples were flown across the country to the National Institute of Bio-Medical Research (INRB) in Kinshasa, where genetic sequencing identified the Bundibugyo variant.

Unlike the Zaire strain, the Bundibugyo ebolavirus has no approved vaccines or therapeutics, rendering standard emergency stockpiles entirely ineffective.

Taking over, fast

The multi-week diagnostic delay allowed the virus to break out of isolated rural mining camps and enter highly populated urban hubs. Confirmed cases have now surfaced in Goma, an eastern economic center of over two million people, as well as the nation’s capital, Kinshasa, and Kampala, the capital of neighboring Uganda.

Compounding the biological threat is a severe humanitarian crisis. Active violence by armed militia groups in eastern Congo continues to disrupt emergency medical workflows. Since January 2025, dozens of targeted attacks on healthcare workers have been recorded, which will severely complicate the rollout of three new treatment centers announced by Congolese Health Minister Samuel Roger Kamba.

The US Centers for Disease Control and Prevention (CDC) has issued an urgent Level 2 Travel Advisory for the region, implementing enhanced screening protocols for arriving travellers at US ports of entry.