广东省惠州市新型冠状病毒肺炎聚集性疫情流行病学特征

Epidemic characteristics analysis of COVID-19 cluster in Huizhou, Guangdong

目的分析惠州市2020年1—2月发生的新型冠状病毒肺炎聚集性疫情的流行病学特征,为聚集性疫情的防控提供经验依据。方法采用描述流行病学方法对惠州市聚集性新型冠状病毒肺炎资料进行分析。结果2020年1—2月惠州市共报告新型冠状病毒肺炎聚集性疫情19起,发生聚集性疫情起数较多的为惠东县(8起),博罗县(3起)、惠阳区(3起)。19起事件涉及病例59例,其中确诊病例46例,无症状感染者13例,男女性别比0.84∶1,年龄1~85岁。19起事件均为输入性病例引起,其中武汉输入13起(占68.4%),湖北省除武汉外输入3起(占15.8%),其它省市输入3起(占15.8%)。一代病例的事件为13起(占68.4%),发生二代病例的事件6起(占31.6%)。事件暴露场所多样,3起(占15.8%)单纯的家庭暴露;13起(占68.4%)共同暴露、家庭暴露;1起(占5.26%)共同暴露、家庭暴露、聚餐暴露;1起(占5.26%)共同暴露、家庭暴露、公共场所(酒店)暴露;1起(占5.26%)集体单位(工作场所)暴露。结论惠州市新型冠状病毒肺炎聚集性疫情均以输入性病例引起,绝大多数发生在家庭内部,由家庭共同生活共同就餐引起。随着复工、复产、复学等人员增加,应对重点地区、重点人群、重点场所落实各项防控措施,防止疫情反弹。

Objective To analyze the epidemiological characteristics of COVID-19 cluster epidemic in Huizhou from January to February in 2020,and we provide experience and reference for the prevention and control of cluster epidemic.Methods Descriptive epidemiology was used to analyze the clusters of COVID-19 in Huizhou city.Results From January to February in 2020,a total of 19 COVID-19 cluster outbreaks were reported in Huizhou.The most common cluster outbreaks were in Huidong county(8 cases),Boluo county(3 cases)and Huiyang district(3 cases).There were 59 cases involved in 19 outbreaks,among which 46 were confirmed cases,and 13 were asymptomatic infected.The sex ratio of male to female was 0.84∶1,the age was 1-85 years old.The 19 cases of outbreaks were all caused by imported cases,among which 13 cases were imported from Wuhan(68.4%),3 cases were imported from Hubei province except Wuhan(15.8%),and 3 cases were imported from other provinces and cities(15.8%).There were 13 cases(68.4%)in the first generation,and 6 cases(31.6%)in the second generation.Events exposed place were variety,including 3(15.8%)simple family exposure,13(68.4%)joint exposure,exposure family,1(5.26%)of the joint exposure,family exposure,family dinners,1(5.26%)of the joint exposure,family exposure,exposure(hotel)exposed in public places,1(5.26%)of the collective unit(workplace)exposure.Conclusion All the COVID-19 cluster outbreaks in Huizhou city were caused by imported cases,most of which occurred in the family and were caused by families living together and eating together.As the number of people returning to work,production and school increases,various prevention and control measures should be implemented in key areas,key populations and key places to prevent the outbreak from rebounding.