目的了解重庆市九龙坡区甲型H1N1流感暴发疫情的流行病学特征,为更好地制定有针对性的控制措施提供依据。方法对重庆市九龙坡区2009年甲型H1N1流感暴发疫情处理资料进行描述性分析。结果 16起甲型H1N1流感暴发疫情累计确诊64例,平均罹患率为0.36%(64/17778);疫情集中发生在9月,发病人群主要是中专职校学生;男女性别比为3:1。结论甲型H1N1流感暴发疫情均发生在学校,学校是控制甲型H1N1流感疫情的关键,应及时报告疫情、有效落实控制措施。 Objective To understand the epidemiological characteristics of Influenza A (H1N1) outbreaks in Jiulongpo District, Chongqing, and to provide a basis for better targeted control measures. Methods Descriptive analysis of 2009 H1N1 flu outbreak data in Jiulongpo District, Chongqing City. Results A total of 64 outbreaks of influenza A (H1N1) outbreaks were diagnosed in 64 cases, with an average rate of 0.36% (64/17778). Outbreaks occurred mainly in September. The prevalence was mainly among secondary vocational school students. The sex ratio was 3: 1 . Conclusions Influenza A (H1N1) outbreaks occur in schools and schools. The key to controlling the outbreak of influenza A (H1N1) is to report the outbreak in time and effectively implement the control measures.