Did a Siberian plague institute worker die of mystery pneumonia & is Russia already covering it up?

A laboratory worker at Russia’s Irkutsk Anti-Plague Research Institute in Siberia has died after developing pneumonia of an unknown cause, prompting quarantine measures and medical monitoring of her contacts. Unconfirmed reports have raised fears of pneumonic plague, but Russian authorities say testing found no evidence linking her illness to the pathogens handled at the institute.