摘要 : In 1958, a 5-year-old boy from Powas-san, Ontario, Canada, died from a severe form of encephalitis. A virus was isolated from brain tissue and named after the hometown where the child resided [l]. Since its original description, f... 展开 In 1958, a 5-year-old boy from Powas-san, Ontario, Canada, died from a severe form of encephalitis. A virus was isolated from brain tissue and named after the hometown where the child resided [l]. Since its original description, fewer than 100 cases of Powassan virus encephalitis have been reported in North America; in addition, at least 17 cases have been reported from the Primorski Krai region of Russia. 收起