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目的了解甲型H1N1流感流行病学特征。方法检索报告病例数超过1000例或者出现死亡病例国家发布的疫情报告,汇总数据、分析。结果甲型H1N1流感的感染对象中男女性各占50%,20岁以下人群约占60%;需要住院治疗的比例大约为9%,住院病例中约70%有基础性疾病或者特殊身体状况;病死率约0.4%～0.5%。结论甲型H1N1流感的感染对象无性别差异,年轻人易感,感染后导致疾病严重程度为中等,病死率随着年龄增大而增加,但也需要关注年轻患者;病毒传播与人际交往频繁程度有关;在夏季也可以传播,但秋冬季的传播速度更快。
Objective To understand the epidemiological characteristics of influenza A (H1N1). Methods Retrieve the number of reported cases of more than 1000 cases or the deaths of countries issued epidemiological reports, summary data, analysis. Results Influenza A (H1N1) infection accounted for 50% of men and women, 60% of people under 20 years of age. Approximately 9% required hospitalization and about 70% of hospitalized cases had underlying diseases or special physical conditions. The mortality rate is about 0.4% ~ 0.5%. Conclusion Influenza A (H1N1) infection has no gender difference and is susceptible to young people. It leads to a moderate disease severity after infection. The case fatality rate increases with age, but it also needs attention in young patients. The frequency of virus transmission and interpersonal communication Related; can be spread in the summer, but the spread of autumn and winter faster.