流行性感冒(简称流感)是由流感病毒引起的急性呼吸道传染病,是全球范围的严重公共卫生问题,经常引起地方性流行,但有时也会引起世界性大流行。我国是流感的高发区,每年均有不同程度流行,严重威胁人民健康。1957年以来发生的3次世界性流感大流行的新亚型均首发于我国。国外在流 Influenza is an acute respiratory disease caused by the flu virus, a serious public health problem worldwide that often causes endemic but sometimes catastrophic pandemics. My country is a high-incidence area of ​​influenza, with varying degrees of prevalence every year, which seriously threatens people’s health. Three new subtypes of the world influenza pandemic occurred since 1957 in our country. Foreign flow