Mystery death at Russian plague lab triggers sweeping precautions as US watches closely

Russian authorities have quarantined a hospital and placed scores of people under medical observation after a 28-year-old employee at a Siberian plague research institute died from a mysterious case of pneumonia, fueling fears — still unconfirmed — that she may have contracted pneumonic plague.Darya Shipilova worked at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East.Russian health authorities say extensive testing found no evidence that her illness was caused by pathogens linked to her work, but officials have yet to publicly identify what killed her.The extraordinary precautions surrounding the case have fueled speculation inside and outside Russia.

Reuters reported Oct.5 that all known contacts had been traced and placed under medical supervision and that authorities said no new cases had been identified among employees of the institute.Secretary of State Marco Rubio said Monday that the U.S.

was "watching and monitoring it closely," adding,"I don’t think it’s cause for alarm, but it is cause for focus and a cause just to keep an eye on it."US MONITORING SUSPECTED FATAL PNEUMONIC PLAGUE CASE IN RUSSIA, STATE DEPARTMENT OFFICIAL SAYSA view of the Medical Assistance and Rescue Centre, an infectious diseases hospital, in the town of Shelekhov in the Irkutsk region, Russia, October 5, 2026.(Reuters)Rubio said information released by Russia appeared to show "there was a worker at the lab that was infected" and concern that the illness could have spread internally.

He noted that travel between Russia and the U.S.is limited but warned that "something like that gets out, it just quickly spreads."The comments follow a State Department statement to Fox News on Oct.

4 that Washington was monitoring the case alongside the Centers for Disease Control and Prevention and other federal agencies.The official stressed that many details remained unconfirmed and urged Moscow to provide accurate information quickly.Additional reporting provided Mond...