流感是流感病毒引起的呼吸道疾病,它发病突然、传染性强,严重时威胁患者生命。接种流感疫苗虽不是预防流感的惟一措施,但却可以说是预防流感最简便、经济和安全有效的方法。中华医学会会长钟南山院士指出,流感的威胁在于其快速传播能力和病死率, Flu is caused by influenza virus respiratory disease, its incidence suddenly, contagious, serious threat to patient’s life. Although influenza vaccination is not the only measure to prevent influenza, it can be said that influenza vaccination is the simplest, most economical, safe and effective way to prevent it. Academician Zhong Nanshan, chairman of the Chinese Medical Association, pointed out that the threat of the flu lies in its ability to spread rapidly and its case fatality rate.