Hello, Im Dr. Tony Fiore with CDCs Influenza Division. Im here to speak with you today about antiviral drugs that can be used to treat or prevent human infections with a new type of H1N1 flu virus, which has also been called swine flu. Since March, 2

发表于:2018-12-11 / 阅读(61) / 评论(0) 分类 英语解说豆知识2009年