A Russian laboratory technician has died from pneumonic plague following exposure to the bacterium during her work at the Irkutsk Anti-Plague Institute in Siberia, prompting quarantine measures and raising concerns of a potential outbreak. Darya Shipilova, 28, was hospitalized on September 29 with severe pneumonia and placed on a ventilator but succumbed to the infection two days later.

Authorities have quarantined approximately 200 individuals who had contact with Shipilova, and three hospitals in the region have implemented heightened security protocols. Public events in Irkutsk and surrounding areas have been canceled as a precautionary measure. The plague is known to be highly lethal if untreated, but fatalities drop to around 17% when antibiotic treatment begins within 24 hours. However, local pharmacies report running low on antibiotics due to increased public demand.

Reports indicate that Shipilova became ill while on a field expedition in Buryatia, near Russia’s eastern border, after reportedly breaking a test tube containing live plague bacteria. She was subsequently transferred to a hospital in Shelekhov, one of several facilities now under quarantine. Some accounts suggest the incident occurred during sample collection in Buryatia, where plague cases have been identified.

The pneumonic form of the plague causes severe respiratory symptoms, including fever, difficulty breathing, and coughing up blood, typically developing three to seven days after exposure. It is transmitted via airborne droplets from infected individuals, distinct from the bubonic plague that caused the Black Death in medieval Europe.

Russian health officials have faced criticism and skepticism regarding the official narrative. Mikhail Favorov, a senior epidemiologist, dismissed the explanation that the infection resulted from a broken test tube, highlighting the protective measures staff typically employ at the Anti-Plague Institute. He suggested the public might be given a simplified version of events and voiced concern that the true circumstances remain undisclosed.

Governor Alexei Tsydenov of Buryatia confirmed a fatal plague case in the neighboring Irkutsk region but offered no further details. Russia’s chief sanitary doctor, Anna Popova, traveled from Moscow to Siberia to lead the response efforts. A mask mandate has been imposed in Irkutsk to help contain the spread.

In Shelekhov, Mayor Maxim Modin urged residents to avoid spreading unverified information while health specialists continue their investigation into the incident and its implications. The situation remains fluid as authorities work to prevent a wider outbreak in the region.