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目的探讨浙江省学生甲型H1N1流感(甲流)流行特征,为其防控提供科学依据。方法对中国疾病预防控制信息系统中2009年浙江省学生甲流个案信息和聚集性疫情进行描述分析。结果浙江省学生甲流病例数占全市病例总数的比例为44.20%(217/491)～78.70%(532/676)不等;高达91.23%(52/57)的聚集性甲流疫情发生在学校。学生甲流病例的住院率和病死率分别为16.05%(1 188/7 402)和0.027%(2/7 402)。全省学生甲流于9月9-11日首次达到流行高峰,日发病数为67例;然后疫情逐步攀升并于11月21-23日达到一个新高峰,其流行强度约为首次高峰的2.91倍;随后疫情持续减弱。结论学生应成为甲型H1N1流感尤其是其聚集性疫情防控的重点人群。
Objective To explore the epidemiological characteristics of Influenza A (H1N1) influenza in Zhejiang Province and to provide a scientific basis for their prevention and control. Methods Describing and analyzing the case information and clustered epidemic situation of the students in Zhejiang Province in 2009 in China’s disease prevention and control information system. Results The proportion of cases of A cases among Zhejiang students was 44.20% (217/491) ~ 78.70% (532/676) in Zhejiang province. The epidemic of aggregated cases of A cases up to 91.23% (52/57) occurred in schools . The hospitalization rate and case fatality rate were 16.05% (1 188/7 402) and 0.027% (2/7 402) respectively for student A cases. A province students first reached the peak of the epidemic on September 9-11, with a daily incidence of 67 cases; then the epidemic rose gradually and reached a new peak on November 21-23 with a prevalence of 2.91 at the first peak Times; then the epidemic continued to weaken. Conclusions Students should become the key group of Influenza A (H1N1) Influenza, especially their cluster epidemic prevention and control.