河南省信阳市51起新型冠状病毒肺炎聚集性疫情流行病学特征

目的 分析新型冠状病毒肺炎聚集性疫情的发生特点和流行规律,为制定疫情防控策略和措施提供科学依据。方法 根据国家卫生健康委《新型冠状病毒肺炎聚集性疫情流行病学调查指南(试行第一版)》,对2020年1月13日—3月2日报告的274例新型冠状病毒肺炎确诊病例及11例无症状感染者开展流行病学调查研究。结果 信阳市新冠肺炎聚集性疫情共发生51起,首例病例有武汉等地旅行或居住史者31起(60.78%),发病潜伏期中位数为7 d,传染人数中位数为2人。包括家庭聚集45起(88.24%),混合聚集4起(7.84%),工作聚集2起(3.92%)。共涉及139例确诊病例及10例无症状感染者,占全市总病例数的52.28%。输入性病例48例(32.21%),本地病例101例(67.79%);一代病例85例(57.05%),二代病例63例(42.28%),三代病例1例(0.67%)。暴露史有共同居住生活的84例(56.38%),共同聚餐的51例(34.23%),工作场所密切接触的12例(8.05%),娱乐场所聚集的2例(1.34%)。结论 51起聚集性疫情以家庭聚集性为主;病例的暴露史多为有共同居住生活史和共同聚餐史;多数聚集性疫情的首例病例有武汉等地旅行或居住史。

Epidemiological characteristics of clustering outbreaks of 51 cases of COVID-19 in

Objective To analyze the occurrence characteristics and epidemic regularity of a new epidemic situation of COVID-19,and we provide scientific basis for formulating strategies and measures for epidemic prevention and control.Methods According to the＂Guidelines for Epidemiological Investigation of Aggregated Epidemic Situation of COVID-19(Trial Version)＂by the National Health and Medical Commission,274 confirmed cases of COVID-19 and 11 asymptomatic infections reported from January 13 to March 2,2020 were carried out epidemiological investigations.Results There were a total of 51 cases of COVID-19 epidemic outbreaks in Xinyang City.The first case had 31 cases(60.78%)with travel or residence history in Wuhan and other places.The median incubation period was 7 days,and the median number of infections was 2.Including family gatherings were 45 cases(88.24%),mixed gathering 4 cases(7.84%),working gathering 2 cases(3.92%).A total of 139 confirmed cases and 10 asymptomatic infections were involved,accounting for 52.28% of the city's total number of cases.There were 48 imported cases(32.21%),101 local cases(67.79%);85 first-generation cases(57.05%),63 second-generation cases(42.28%),and 1 third-generation case(0.67%).In the history of exposure,there were 84 cases(56.38%)living together,51 cases(34.23%)sharing dinner together,12 cases(8.05%)in close working place,and 2 cases(1.34%)gathering in entertainment places.Conclusions The 51 cases of clustered epidemic is dominated by families.The exposure history of the cases is mostly living together and eating together.The first case of most clustered epidemics is those who traveled or lived in Wuhan and other places.The causes of most cases were linked with the outbreak of COVID-19 in Wuhan,Hubei.