Journal of Shandong University (Health Sciences) ›› 2020, Vol. 58 ›› Issue (10): 95-99.doi: 10.6040/j.issn.1671-7554.0.2020.0677

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Investigation of a family cluster outbreak of coronavirus disease 2019 in Xian

BAI Yao1,2, CHEN Zhijun1, SONG Shuxuan2, HE Zhen2, CHEN Baozhong1, SHAO Zhongjun2, LIU Kun2   

  1. 1. Institute for Infectious Diseases Prevention, Xian Center for Disease Prevention and Control, Xian 710054, Shaanxi, China;
    2. Department of Epidemiology, School of Public Health, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Air Force Medical University, Xian 710032, Shaanxi, China
  • Published:2020-10-08

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Abstract: Objective To investigate the transmission characteristics of a family cluster outbreak of coronavirus disease 2019(COVID-19)in Xian, in order to provide reference for prevention and control efforts. Methods Epidemiological investigations on the confirmed cases, asymptomatic carriers and their close contacts were carried out, the transmission chain was analyzed, and the pharyngeal swabs for nucleic acid tests of SARS-CoV-2 were collected. Results A total of 4 mild cases, 1 severe case and 2 asymptomatic carriers were tracked. The severe case finally died. The first case(A)had onset on Jan. 31, 2020, and the other cases(B, C as well as D, E)had onset 1-13 days later, who were second, third, and fourth generation cases. Conclusion The prevention and control of COVID-19 should focus on family cluster outbreak. Early detection of the source of infection and screening and isolation of close contacts are important to prevent the spread of the epidemic.

Key words: Coronavirus disease 2019, Cluster outbreak, Transmission characteristics

CLC Number: 

  • R511
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