Russia plague global risk is very low in Europe, WHO says
WHO says a suspected plague-related death in Siberia poses very low risk to Europe, while tests continue to identify the cause.
By Theo Nakamura · Staff Writer
· 3 min read
The Russia plague global risk appears very low for the World Health Organization’s European region, according to the agency’s initial assessment of a laboratory worker’s death in Siberia. The case has drawn attention because the cause of death remains unconfirmed, so the assessment is preliminary and may change as testing produces more information.
On Oct. 6, the WHO said the risk was moderate to low in Irkutsk, low across Russia and very low for the WHO European region. A woman who worked at a laboratory in Irkutsk oblast died, and Russian authorities were investigating whether pneumonic plague, the lung form of the disease, was responsible, the WHO said.
No official cause of death had been confirmed at that point. The WHO said it had contacted Russian authorities under international health regulations to verify the circumstances, laboratory work, contact tracing and any possible international public-health implications.
How high is the global risk from the suspected Russia plague case?
The WHO’s current answer is geographically limited: very low for its European region, low for Russia overall and moderate to low in Irkutsk. That is not a confirmation that the worker had plague, nor is it a final risk finding.
Russian authorities told the WHO that no dangerous infectious-disease pathogens had been detected among the worker’s contacts. The agency said all contacts had reportedly been identified and placed under monitoring, with none showing symptoms at the time of its assessment. Those reported findings are consistent with WHO’s current preliminary assessment, which it said it would update as more information arrives.
Reports have included claims that the worker may have been exposed to plague in a laboratory accident. Russian officials disputed that account, according to CBS News, and neither an accident nor a plague diagnosis has been established.
Why pneumonic plague is under scrutiny
Plague is a bacterial disease caused by Yersinia pestis, which is usually found in small mammals and their fleas, according to the WHO. The most common form is bubonic plague. Pneumonic plague occurs when the infection affects the lungs, and it is the form that can pass from person to person through respiratory particles.
That transmission route is why confirmation would matter for public-health monitoring. The WHO says pneumonic plague can cause severe outbreaks, but prompt treatment with antibiotics can cure the disease. Without treatment, it can become fatal quickly.
The key unanswered question is what pathogen, if any, caused the Irkutsk worker’s illness. Definitive confirmation of plague requires laboratory identification of Y. pestis from relevant clinical samples, the WHO says. Until ongoing testing provides that evidence, reports about the case should be read as an investigation rather than a confirmed outbreak.
Raj Panjabi, a Harvard physician and former White House biosecurity director, told CNBC he could not confidently classify the wider public risk without more publicly shared testing and genetic-sequencing information. For now, the WHO’s assessment remains the clearest official measure, with a stated caveat that it can be revised.
This story draws on original reporting from CNBC.
