流行性感冒是以爆发性大流行为特征的急性呼吸道传染病,在历史上曾多次流行。例如1918～1919年的西班牙感冒,全世界患者达七亿之多,死亡者近二千万人。近年来幸亏没有上述那种程度的大流行,但在1957年的流感大流行中,仅日本死亡者就有8000人;1962年死亡者达7000人,是传染病中危害最大者。一、现行的流感疫苗病毒疫苗有两种,其一是用化学药品等把病毒的感染性杀灭,使之成为灭活疫苗,其二 Influenza is an acute respiratory infection characterized by an outbreak of pandemic and has been prevalent in history. For example, from 1918 to 1919, the Spanish flu caught more than 700 million patients worldwide and nearly 20 million people died. In recent years, thanks to the absence of such a pandemic of the kind described above, in the 1957 influenza pandemic, there were 8,000 deaths in Japan alone and 7,000 deaths in 1962, making it the hardest hit by infectious diseases. First, the current influenza vaccine There are two kinds of virus vaccine, one is to kill the virus with chemicals such as killing, making it an inactivated vaccine, the second