单词	Powassan encephalitis
释义	Powassan encephalitis noun Po·​was·​san encephalitis pə-ˈwä-sən-  : a severe form of Powassan virus marked especially by encephalitis Ten percent of Powassan encephalitis cases are fatal. About half the survivors have permanent neurological symptoms. Lynn Bonner Word History First Known Use 1967, in the meaning defined above Medical Definition Powassan encephalitis noun Po·​was·​san encephalitis pə-ˈwä-sən-  : a severe form of Powassan virus marked especially by encephalitis Ten percent of Powassan encephalitis cases are fatal. About half the survivors have permanent neurological symptoms. Lynn Bonner
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