Researcher dies of ‘unknown infection’ at Russia's plague lab, at least 200 quarantined: Here's what we know so far

Authorities in Russia are investigating a laboratory incident that occurred in Siberia, resulting in the death of a researcher and the release of a potentially dangerous infection. The 28-year-old woman was hospitalized with pneumonia symptoms at Shelekhov Hospital on September 29 and later placed on a ventilator, ultimately dying two days later.

Roughly 200 people, including staff from the hospital and the institution, were placed under medical observation. While the cause of her death remains unclear, the woman was diagnosed with pneumonia of "unknown origin." Rospotrebnadzor, the state agency handling infectious diseases, stated that special measures were taken in connection with the incident involving the employee of the Irkutsk Anti-Plague Institute.

The agency said the employee was diagnosed with "pneumonia of unknown etiology" or cause. The identity of the infection remains uncertain, with speculation ranging from a lab accident to potential exposure to plague. However, experts, including Alexei Tsydenov, the head of Buryatia, and Gennady Onishchenko, a former head of Rospotrebnadzor, have ruled out the possibility of the infection being plague, stating that there would be no spread of this disease.

The governor of Irkutsk, Igor Kobzev, urged people to remain calm, and a meeting of the regional anti-epidemic commission was held in connection with the suspected case. The US State Department spokesperson acknowledged the potential death due to pneumonic plague and urged Russian authorities to share accurate information quickly and openly.