Russian Anti-Plague Lab Worker Dies of Suspected Pneumonic Plague as 200 Remain Under Observation

A worker at Russia’s Irkutsk Anti-Plague Institute has died after severe pneumonia, prompting quarantine measures and medical observation for nearly 200 contacts. Russian media reported the illness as suspected pneumonic plague, while a regional governor described the cause as pneumonia of undetermined origin. Officials said no microorganisms linked to the woman’s professional activities were detected and reported no new cases among laboratory staff. The World Health Organization said no cause of death had been officially confirmed as authorities investigate incident.