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1背景人类认识流感病毒首先从1901年分离到的鸡瘟(fowl plague)病毒开始,尽管该病毒直到1955年才被证明与哺乳动物的A型流感紧密相关;受1918年全球流感大流行期间
1 Background Human cognition The flu virus first started with the fowl plague virus isolated in 1901 although it was not shown to be closely associated with mammalian influenza A until 1955; it was not affected by the 1918 pandemic