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1957年3-4月間,我国經历了一次全国性流感大流行。以后經香港、新加坡而傳播至日本和东南亞,并再傳播至澳洲、欧洲和美洲。引起此次全世界大流行的流感病毒,早經我国学者首先証明为甲型的新的亞型,其抗原性与以往發現过的流感病毒很不相同,人群对它沒有免疫力,因此易感性高,傳播快,流行范圍广,發病率也高,現已將此新病毒定名为“亞洲甲型”(病毒株又可以分为I、Ⅱ兩个相)。这次流行的特征:(1)流行地区广泛:据現有资料,除西藏未見正式报告外,其他各省市均有流行。(2)發病率高:根据一些城市的估計,約
From March to April 1957, our country experienced a national influenza pandemic. After Hong Kong, Singapore and spread to Japan and Southeast Asia, and then spread to Australia, Europe and the Americas. The influenza virus that caused this pandemic of the world, as early as the Chinese scholars first proved to be a new subtype of A, the antigenicity is very different from the previously discovered influenza virus, the population has no immunity to it, so the susceptibility High, fast spread, wide range of epidemic, the incidence is also high, this new virus has been named “Asian A” (virus strain can be divided into I, II two phase). The characteristics of this popular: (1) a wide area of popular: According to available information, except for the official report in Tibet, other provinces and cities are popular. (2) high incidence: According to some city estimates, about