2009年3月墨西哥暴发甲型HIN1流感疫情,随后出现了全球大流行。此次疫情的病原为变异后的新型甲型H1N1流感病毒,人类普遍易感[1-2]。甲型H1N1流感是一种急性呼吸系统传染病,多数病例临床表现温和,少数病例病情进展迅速,可出现病毒性肺炎,合并呼吸衰竭、多脏器功能损伤,严重者可导致死亡。据文献报道,甲型H1N1流感病毒性肺炎患者中71%为严重肺炎,发生年龄为5～59岁[3], An outbreak of Influenza A (H1N1) was reported in Mexico in March 2009, followed by a global pandemic. The pathogen of the outbreak is a variant of the new type A H1N1 influenza virus, which is generally predisposed to humans [1-2]. Influenza A (H1N1) is an acute respiratory infection. Most cases have mild clinical manifestations. In a small number of cases, the disease progresses rapidly. Viral pneumonia can occur. Combined respiratory failure and multiple organ damage may occur. In severe cases, death may occur. According to the literature, 71% of patients with influenza A (H1N1) virus pneumonia are severe pneumonia, with an age of 5 to 59 years [3],