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A laboratory worker in Russia’s Irkutsk region died after developing pneumonia, which prompted concerns about a possible case of pneumonic plague. Russian authorities said the cause of her pneumonia was unknown and reported no evidence linking the illness to her laboratory work. Contacts have been placed under medical observation, while international health officials monitor the situation. Here's what we know about the situation as of Tuesday, October 6th at 5a.m. EST. #plague #russia #news