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Siberia Quarantines Dozens After Plague Lab Worker Dies

By Dr. Lunide Louis
A view of the Medical Assistance and Rescue Centre, an infectious diseases hospital, in the town of Shelekhov in the Irkutsk region of Siberia, Russia on October 5, 2026.

A laboratory worker at a plague research institute in Siberia has died, triggering quarantines and a rapid response from Russian health authorities.

Naturally, one question followed: is there a wider health threat?

The woman, identified by local media as 28-year-old Darya Shipilova, worked at the Irkutsk Anti-Plague Research Institute.

Authorities said she died from “pneumonia of unknown aetiology,” while stressing there was no evidence linking her illness to laboratory work.

Rumours online claimed she had accidentally dropped a test tube containing live plague bacteria.

Russia’s health watchdog, Rospotrebnadzor, rejected that account, saying investigators found no evidence of an accident involving pathogens.

Still, authorities quarantined people who had contact with her, restricted access to parts of the hospital where she died.

They required masks at a nearby aluminium plant.

Containment Measures Intensify

Rospotrebnadzor chief Anna Popova also travelled to the region for an emergency meeting.

Regional governor Igor Kobzev said all known contacts had been identified and placed under medical supervision.

“No new cases” had been reported among institute staff.

US Secretary of State Marco Rubio said Washington was monitoring the situation but added, “I don’t think it’s cause for alarm.”

Plague is treatable with antibiotics when caught early, but untreated pneumonic plague can become deadly within days.

For now, officials say the situation is contained. The bigger question is whether that reassurance will outlast the rumours.

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