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目的了解许昌市2009年甲型H1N1流感流行特征,为制定和完善预防控制措施和策略提供科学依据。方法用描述流行病学方法对许昌市2009年甲型H1N1流感疫情资料进行分析。结果许昌市2009年报告甲型H1N1流感确诊病例为243例,发病率为5.76/10万,死亡2例,死亡率为0.05/10万,病死率为0.82%。学校、看守所报告暴发疫情4起,报告病例数为50例,死亡1例。发病高峰期出现在第45～51周,共报告发病216例(占总病例数的88.9%);10～30岁年龄组病例数最多,共176例(占病病例数的72.4%)。结论应加强重点场所和重点人群甲型H1N1流感预防控制和高危人群的医疗救治。
Objective To understand the epidemic characteristics of influenza A (H1N1) in Xuchang in 2009 and provide a scientific basis for formulating and perfecting prevention and control measures and strategies. Methods Descriptive epidemiological methods were used to analyze the 2009 H1N1 flu epidemic data in Xuchang City. Results In 2009, a total of 243 confirmed cases of Influenza A (H1N1) were reported in Xuchang City. The incidence rate was 5.76 / 100,000. There were 2 deaths. The mortality rate was 0.05 / 100,000 and the case fatality rate was 0.82%. Schools and detention houses reported four outbreaks, reporting a total of 50 cases and 1 death. The peak incidence occurred in 45 to 51 weeks, a total of 216 cases were reported (88.9% of the total number of cases); the highest number of cases in the 10 to 30 age group, a total of 176 cases (accounting for 72.4% of the number of cases). Conclusion Prevention and control of influenza A (H1N1) and medical treatment of high-risk groups should be strengthened in key places and key populations.