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目的 掌握北京市集中发热疫情的流行特征,为流感防控提供科学依据.方法 收集北京市2018-2019年流感流行季集中发热疫情资料,对疫情的规模、时间、场所、病原以及防控措施进行描述和分析.结果 北京市2018-2019年流感流行季,共报告集中发热疫情742起,85.64％由流感病毒导致.时间上呈现2个高峰.远郊区疫情的规模及罹患率均小于城区(P＜0.05),托幼机构疫情的罹患率大于其他场所(P＜0.01).经实验室检测,疫情主要由乙型Victoria系流感病毒(39.09％)、甲型H3N2亚型流感病毒(21.82％)和甲型H1N1流感病毒(20.17％)引起.不同型别流感病毒在不同场所和城郊的分布均不同(P＜0.05).疫情介入时间越早规模越小(r=0.35,P＜0.01).结论 北京市集中发热疫情主要分布在小学及托幼机构,疫情的早期发现和处置可以降低疫情的规模.“,”Objective To understand the epidemiology characteristic of febrile outbreaks in Beijing,so as to provide a scientific basis for influenza prevention.Methods The data of febrile outbreaks reported from 2018 to 2019 were collected.The epidemiological characteristics were described and analyzed by scales,time,places,pathogens and interventions of the outbreaks.Results In the 2018-2019 influenza season,a total of 742 febrile outbreaks were reported,and 85.64％ were caused by the influenza virus.Two peaks were observed in the demension of time.The scales and attack rates of outbreaks in outer suburbs districts were higher than those in urban districts (P＜0.05).The attack rate in child care facilities was greater than those in other places (P＜0.01).According to laboratory tests,the outbreaks were mainly caused by influenza B/Victoria-Linage virus (39.09％),influenza A (H3N2) virus (21.82％) and influenza A (H1Nl)pdm09 virus (20.17％).The differences in the distribution of types of influenza viruses in places and districts were statistically significant (P＜0.05).Earlier intervention reduced the scales of outbreaks (r =0.35,P＜0.01).Conclusions The febrile outbreaks mainly occurred in primary schools and child care facilities.Early detection and intervention may reduce the scale of the outbreaks.