US Experts Monitor Outbreak Following Plague Researcher’s Fatal Passage in Russian Far East

Daria, a 28‑year‑old who recently traveled to the Buryatia region on Russia’s border with Mongolia, died after recently visiting the area.

The plague bacterium Yersinia pestis, external, which caused the Black Death across Europe in the 14th century, has been located among rodents such as marmots in the area.

In response to an outbreak in the 1920s, the Anti‑Plague Institute of Siberia and the Far East was founded more than a century ago.

“Pneumonic plague can transmit from person to person,” said Associate Professor Simon Clarke of the University of Reading, adding “that is why the current concern exists.”

Moreover, he warned that fear of pandemic resurgence overshadows reality, stating that while many equate any infectious crisis with global pandemics, the expected scenario involves containment rather than mass mortality.

Clarke reiterated that plague remains a threat in certain regions, underscoring the necessity of ongoing scientific study.

When asked whether Yersinia pestis could potentially be weaponized as a biotoxin, he acknowledged that such possibilities cannot be dismissed.

The World Health Organization reports that pneumonic plague can present with a remarkably rapid incubation period—sometimes as brief as 24 hours—and carries a high fatality rate if not identified and treated promptly.

Transmission occurs via respiratory droplets, and patients typically experience shortness of breath and a cough accompanied by blood‑tinged phlegm as primary signs.

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