湖州市新型冠状病毒肺炎病例流行特征分析

Epidemiological characteristics of coronavirus disease 2019 in Huzhou

目的分析湖州市新型冠状病毒肺炎(COVID-19)病例的流行特征,为加强COVID-19疫情防控工作提供依据。方法根据《新型冠状病毒肺炎诊疗方案(试行第六版)》诊断标准,以湖州市2020年1月25日—2月7日报告的COVID-19确诊病例为研究对象,通过流行病学调查收集病例诊疗情况、临床症状、暴露史和密切接触者等资料,对COVID-19确诊病例的流行特征进行描述性分析。结果湖州市2020年1月25日报告首例COVID-19确诊病例,至2月7日累计报告10例,均为输入病例,未发现无症状感染者。病例男女性别比为1∶1,年龄中位数为32岁。3例为武汉市居民,2例有武汉市旅行史,3例有随州市旅行史,1例杭州市旅行史和1例泰国旅行史(回国同机有2名武汉市乘客);其中7例自行就诊时发现,3例在隔离过程中发现。病例临床症状以发热、干咳、乏力为主,发病到确诊间隔时间中位数为3 d。截至3月3日,10例病例均治愈出院,病程中位数为24 d。共搜索发现密切接触者312人,均14 d后解除隔离医学观察。结论湖州市采取“外防输入,内防扩散”的措施积极有效,10例COVID-19确诊病例均为输入病例,主要输入地为武汉市,未发生本地传播。

Objective To learn the epidemiological characteristics of coronavirus disease 2019(COVID-19)in Huzhou,so as to provide reference for prevention and control of COVID-19.Methods All the confirmed cases of COVID-19 in Huzhou,diagnosed according to the COVID-19 Diagnosis and Treatment Plan(Sixth Version Trial)and reported from January 25 to February 7,2020,were recruited.The process of diagnosis and treatment,clinical manifestation,exposure history and close contacts were collected to analyze the epidemiological characteristics.Results On January 25,the first confirmed cases of COVID-19 in Huzhou was reported.By February 7,totally 10 confirmed cases were reported and no asymptomatic infection was found.They were all imported,including three Wuhan residents,two with a trip to Wuhan,three with a trip to Suizhou,one with a trip to Hangzhou and one with a trip to Thailand(two Wuhan passengers on the same flight).The ratio of male to female cases was 1∶1.The median age was 32 years old.Seven cases were found when they went to a doctor by themselves,and three cases were found during the quarantine.The main clinical manifestations were fever,dry cough and fatigue.The median time from onset to diagnosis was 3 days.By March 3,all the cases were discharged,with median course of 24 days.There were 312 close contacts,and all of them were released after 14 days of quarantine.Conclusions To prevent imported cases from outside and stop spread inside taken by Huzhou government was proved to be effective.All the COVID-19 cases in Huzhou were imported,mostly from Wuhan.No local cases were reported.