Siberian Researcher Dies After Plague Test Tube Breaks

A researcher in Siberia died after reportedly breaking a test tube containing the plague bacterium Yersinia pestis, triggering hospital quarantines, medical monitoring of about 200 people, and international surveillance for a potential pneumonic plague outbreak. Russian authorities deny a link between the death and a lab leak. Daria Shipilova, a 28-year-old lab assistant, died on October 2, days after the alleged accident at the Irkutsk Anti-Plague Research Institute. Several hospitals were quarantined for three weeks, and officials initially cited "pneumonia of unknown origin" as the cause of death. The US State Department said it is closely monitoring the situation with the CDC, urging Russia to share information transparently. Experts note pneumonic plague spreads person-to-person via respiratory droplets, and laboratory-acquired infections are not unknown.