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目的探讨甲型H1N1流感(甲流)在浙江省的流行特征,为其防控提供依据。方法对中国疾病预防控制信息系统中2009年浙江省甲流个案信息、病原学监测数据和聚集性疫情进行描述流行病学分析。结果 2009年浙江省甲流报告发病率为25.18/10万,病死率为0.26%。病例主要集中在0~29岁,占85.76%;有91.23%的聚集性疫情发生在学校。疫情分别在9月和11月中下旬形成2次流行高峰,第2次流行高峰的强度约是第1次的4.09倍。结论甲型H1N1流感病毒相对较为温和,0~29岁中的儿童、青少年和学生群体是甲流防控重点人群。
Objective To investigate the epidemiological characteristics of Influenza A (H1N1) influenza in Zhejiang Province and provide evidence for its prevention and control. Methods Epidemiological analysis of case information, pathogen surveillance data and aggregated epidemics in Zhejiang Province in 2009 was conducted in China’s disease prevention and control information system. Results In 2009, the incidence of A-flow in Zhejiang Province was 25.18 / 100 000 and the case fatality rate was 0.26%. Cases are mainly concentrated in 0 to 29 years old, accounting for 85.76%; 91.23% of the cluster epidemic occurred in schools. Epidemic in September and November in the second half of the formation of epidemic peak, the intensity of the second peak was about 4.09 times the first. Conclusion Influenza A (H1N1) virus is relatively mild. Children, adolescents and students from 0 to 29 years old are the key people in prevention and control of influenza A (H1N1).