Researcher at Russian Plague Laboratory Dies of ‘Unknown’ Infection

A 28-year-old researcher at Russia’s Irkutsk Anti-Plague Research Institute died after developing severe pneumonia of unknown origin, authorities said. The case has prompted medical observation for nearly 200 people and quarantine measures at a nearby hospital. Officials report that testing found no microorganisms connected to her professional activities and have not confirmed plague or a laboratory accident. Authorities say the regional situation remains stable while investigators examine the circumstances and health agencies monitor contacts for symptoms or signs of transmission.