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WHO says suspected pneumonic plague case in Russia presents 'very low' risk

scienceOct 6, 2026521,091

The World Health Organization said a possible case of pneumonic plague in Irkutsk, Russia, linked to the death of a 28-year-old laboratory worker, presents a "very low" risk outside the country while investigations continue. Russian state media reported the patient was diagnosed with pneumonia of unknown etiology; local outlets named her as Darya Shipilova but CBC News said it has not independently confirmed her identity or work details. The woman reportedly sought care at a hospital in Shelekhov and died; authorities quarantined people at that hospital and placed many contacts under medical supervision, Russia’s public health agency head Anna Popova said. Irkutsk Region Governor Igor Kobzev initially suggested the death was from plague on Telegram, later qualifying his remark, which helped fuel public speculation. The Irkutsk Anti-Plague Research Institute of Siberia and the Far East, where she worked, researches plague, vaccine development and other dangerous pathogens, but Russian officials say there is no evidence linking her illness to pathogens handled at the lab. The U.S., the European Commission and member states are monitoring the situation; the EU added the item to a Health Security Committee meeting, and WHO has asked Russian authorities for information about reports of a second employee with pneumonia of undetermined cause. The CDC has noted pneumonic plague is the most serious form of plague and is treated with antibiotics, but confirmation and details about exposures remain unresolved.

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