A 28-year-old lab worker's death has prompted health officials to take precautions. The worker may have been exposed to pneumonic plague, though the exact cause of death has not been confirmed by authorities. The country's consumer welfare service reported the death as "pneumonia of unknown etiology." As a result, nearly 200 people who had contact with the researcher are under medical observation.

The incident occurred at an anti-plague institute, and health officials have described the current situation as stable. A regional leader and the mayor of Shelekhov have been involved in the response to the incident.

Further details about the situation are available from Russian media reports, which have been citing officials and regional leaders.