Russia Quarantines Sibir After Plague Institute Employee Death; No Pathogen Incident Found

Rospotrebnadzor quarantined the Sibir area and stopped vehicles carrying emergency aid following the death of a 28-year-old employee at its Plague Control Institute. The agency claims no pathogen incident occurred, but the quarantine and FSB involvement suggest heightened concern. The case is described as 'somewhat unusual' by a Croatian expert, indicating uncertainty about the cause.