Mysterious death of Russian lab technician raises questions as US issues alert

The mysterious death of a 28-year-old laboratory technician in Siberia has sparked international concern, with the US issuing an alert while Russia has yet to confirm the cause of death. Authorities officially classify the case as pneumonia of unknown origin. The woman, identified by independent outlet Lyudi Baikala as Daria Shipilova, worked at the anti-plague institute in Irkutsk and died on October 2 after hospitalization. Russian officials deny any work-related microorganism was found, though a governor's statement referencing plague was quickly edited, and a local Telegram post warning of a plague case was deleted after two hours. Reports of a broken test tube containing plague bacteria were rejected by Russian authorities, as were theories involving travel to Thailand or Mongolia. The WHO has contacted Moscow, while Russia urges calm and says only official information should be considered.