Rospotrebnadzor has said that the lab worker at a plague research institute in Irkutsk in southeastern Siberia died of pneumonia of unknown origin Russia’s public health watchdog has denied that a lab worker who died in Siberia had spread infection to another person as global concerns swirled about suspected pneumonic plague. Key points and original sources are listed below.

• Rospotrebnadzor has said that the lab worker at a plague research institute in Irkutsk in southeastern Siberia died of pneumonia of unknown originS1

• Russia’s public health watchdog has denied that a lab worker who died in Siberia had spread infection to another person as global concerns swirled about suspected pneumonic plague.S2