Siberia lab worker's pneumonia death triggers Russian health investigation

Russian authorities are investigating an incident at the Irkutsk Anti-Plague Research Institute in Siberia after a female laboratory worker died from pneumonia of unknown origin, prompting heightened epidemiological surveillance in the region. The 28-year-old researcher was hospitalized with severe symptoms in Shelekhov, near Irkutsk. Regional officials have not ruled out a dangerous infection, though no outbreak has been confirmed and tests on her close contacts have shown no signs of infection. Rospotrebnadzor says the situation is under control, while the U.S. State Department is monitoring the case with public health services. Experts note rare diseases like pneumonic plague are treatable with antibiotics if detected early, but no official confirmation exists.