流感是主要流行于冬季的呼吸道病毒感染性疾病 ,一般经数日～ 1周可治愈 ,但当高龄或有基础疾病等高危人群罹患流感时 ,因并发肺炎、心力衰竭等而死亡者亦并不少见。据记载 ,1 91 8年～ 1 91 9年的西班牙感冒和 1 95 7年的亚洲感冒均死了不少人 ,死因多为急进性肺炎。近年来 , Influenza is the most common viral infection of the respiratory tract in winter. It can usually be cured within a few days to one week. However, when high-risk or elderly people with underlying diseases have flu-like illness, those who die due to complicated pneumonia and heart failure do not Rare. It has been documented that many Spanish people died in Spain between 1918-1991 and those in Asia in 1957. The cause of death was mostly acute pneumonia. In recent years,