The World Health Organization is asking Russia to release more information after a 28-year-old plague lab researcher died. Russia said the woman died of pneumonia of unknown origin and denied any further infectious disease cases. CBS News' Leigh Kiniry reports.
The World Health Organization is asking Russia to release more information after a 28-year-old plague lab researcher died. Russia said the woman died of pneumonia of unknown origin and denied any further infectious disease cases. CBS News' Leigh Kiniry reports.
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