Reemergent Cases of COVID-19--Dalian City,Liaoning Province,China,July 22,2020  

作　　者：Xiang Zhao Lingling Mao Jianqun Zhang Yong Zhang Yang Song Zhijian Bo Hong Wang Ji Wang Cao Chen Jinbo Xiao Tianjiao Ji Qian Yang Wenbo Xu Dayan Wang Wenqing Yao 

机构地区：[1]National Institute for Viral Disease Control and Prevention,Chinese Center for Disease Control and Prevention,Beijing,China [2]Liaoning Province Center for Disease Control and Prevention,Shenyang,Liaoning,China [3]Dalian Municipal Center for Disease Control and Prevention,Dalian,Liaoning,China

出　　处：《China CDC weekly》2020年第34期658-660,共3页中国疾病预防控制中心周报（英文）

基　　金：supported by the National Key Technology R&D Programs of China(Project No.2017ZX10104001,2018ZX 10102001,2018ZX10711001,2018ZX10713002).

摘　　要：From July 22-23,3 local COVID-19 cases were reported in Dalian City,Liaoning Province,China.All 3 patients reported that they did not leave Dalian 14 days before the onset of disease and had no COVID-19 case contact history and no foreign personnel contact history.Epidemiological investigation,medical isolation,and nucleic acid detection was immediately carried out in Dalian,and 12 asymptomatic infections were detected in close contacts of Patient 1.Because asymptomatic infections made up a large proportion of total infections,the outbreak was likely observed in the beginning stages.

关 键 词：DALIAN LIKELY LIAONING 

分 类 号：R563.1[医药卫生—呼吸系统] R181.3[医药卫生—内科学]