西安市新型冠状病毒肺炎密切接触者的流行特征

Epidemic characteristics of close contacts of coronavirus disease 2019 in Xi'an

目的分析西安市新型冠状病毒肺炎(新冠肺炎)密切接触者的流行特征,为后续疫情防控提供参考。方法收集西安市新冠肺炎密切接触者的相关数据,分析密切接触者的分布规律、不同接触途径下密切接触者的隔离状态及确诊病例的分布情况。结果截至2月28日0点,西安市新冠肺炎累计确诊120例,密切接触者5241例。在所有密切接触者中,医务工作者占7.92%;不同年龄段中,青年人数最多(2934人,56%);西安市10区3县中,雁塔区人数最多(913人,17.42%),鄠邑区人数最少(29人,0.55%)。密切接触者的接触途径以家庭内(1875人)为首,确诊病例的接触途径也以家庭内最多(35人),其次为购物场所(26人)。结论截至2月28日0点,西安市新冠肺炎密切接触者多出现在雁塔区,以青年为主要人群,家庭内的亲密接触存在很高的传染风险。针对以上特点,需提高对重点地区和人群中新冠肺炎密切接触者筛查工作的重视。

Objective To explore the epidemic characteristics of close contacts of corona virus disease 2019(COVID-19)in Xi'an so as to provide reference for further prevention and control of the epidemic.Methods Data of the close contacts of COVID-19 in Xi'an was collected.We analyzed the distribution of close contacts in the population and isolation measures of close contacts and confirmed cases among different exposure conditions.Results By 0:00 February 28,the cumulative number of confirmed cases and close contacts in Xi'an had been 120 and 5241,respectively.Medical workers accounted for 7.92%of the close contacts.Across different age groups,the proportion of the youth group was the highest(56%).Indifferent areas of Xi'an,Yanta District had the largest number of close contacts(913)while Huyi District had the lowest number(29).The main contact route was contact within the family(1875).The majority of the confirmed cases were infected within the family(35),followed by shopping places(26).Conclusion By 0:00 February 28,close contacts of COVID-19 in Xi'an had mostly been found in Yanta District.The young constituted the main group,and close contacts within the family had a high risk of infection.In view of the above characteristics,it is necessary to improve the screening of people having close contact with COVID-19 in key areas and populations.