India, Oct. 6 -- Russian authorities have quarantined a hospital and are monitoring contacts of an employee at a plague research institute in Siberia who contracted pneumonia of an "unknown" cause. Local state TV said the woman died last week. Russian authorities said they found no evidence that her illness was caused by any of the pathogens she worked with. But the case has raised alarm in Russia after unconfirmed media reports suggested she might have died of pneumonic plague - a less common but severe form of plague that can spread from person to person. The woman worked at the Irkutsk Anti-Plague Research Institute of Siberia and the Far East in Irkutsk, Siberia. A state TV station in Irkutsk reported Monday that she died last week in a...