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目的分析河南省2009年甲型H1N1流感大流行聚集性疫情的流行病学特点。方法对“中国流感监测信息系统”中报告的甲型H1N1流感聚集性疫情进行描述性流行病学分析。结果 2009年河南省共报告甲型H1N1流感聚集性疫情90起(发病1 230例,死亡2例),其中学校(包括幼托机构)报告聚集性疫情77起(占总起数的85.56%),以中学为主(40起,44.44%)。郑州市聚集性较多(40起,占44.44%)。报告高峰出现在2009年9月。结论河南省2009年甲型H1N1流感大流行聚集性疫情集中分布于7~11月份,流行高峰的起点明显早于季节性流感,且流行强度远超过季节性流感。在流感大流行年份需进一步加强学校重点场所的防控力度。
Objective To analyze the epidemiological characteristics of the epidemic of pandemic influenza A (H1N1) in Henan Province in 2009. Methods Descriptive epidemiological analysis of Influenza A (H1N1) cluster epidemics reported in China Influenza Surveillance Information System was conducted. Results A total of 90 Influenza A (H1N1) outbreaks were reported in Henan Province in 2009 (1 230 cases and 2 deaths), of which 77 (85.56% of the total) were reported by schools (including child care institutions) , Mainly secondary schools (40, 44.44%). Zhengzhou City gathered more (40, accounting for 44.44%). The report peaked in September 2009. Conclusion In 2009, the epidemic situation of pandemic influenza A (H1N1) in Henan Province was concentrated in July and November. The starting point of the epidemic peak was earlier than that of seasonal influenza, and the epidemic intensity far exceeded that of seasonal flu. In the year of influenza pandemic need to further strengthen the prevention and control of key areas of the school.