Epidemiological investigation on a cluster epidemic of COVID-19 in a collective workplace in Tianjin
10.3760/cma.j.cn112338-20200219-00121
- VernacularTitle: 一起天津市集体单位内新型冠状病毒肺炎聚集性疫情流行病学调查
- Author:
Ying ZHANG
1
;
Xu SU
2
;
Wei CHEN
1
;
Chunnan FEI
1
;
Liru GUO
2
;
Xiaoli WU
1
;
Ning ZHOU
3
;
Yuting GUO
1
;
Xiaochun DONG
1
;
Ying ZHAO
1
;
Haowu WANG
4
;
Yong PAN
5
;
Lijuan ZUO
6
Author Information
1. Institute for Communicable Disease Prevention and Control, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
2. Institute for Pathogenic Biology, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
3. Institute for AIDS/STD Prevention and Control, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
4. Leadership Office, Hedong District Center for Disease Control and Prevention, Tianjin 300151, China
5. Department for Communicable Disease Prevention and Control, Hebei District Center for Disease Control and Prevention, Tianjin 300150, China
6. Business office, Hebei District Center for Disease Control and Prevention, Tianjin 300150, China
- Publication Type:Journal Article
- Keywords:
COVID-19;
Cluster epidemic;
Epidemiological investigation
- From:Chinese Journal of Epidemiology
2020;41(5):649-653
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate and analysis the epidemiological characteristics of a cluster epidemic of COIVD-19 in a collective workplace in Tianjin, evduate the prevention and control measures based on limited evidence and experience in early period of COVID-19 epidemic. Methods Descriptive research method was used to describe the distribution and other epidemiological characteristics of the cluster cases of COVID-19. Results Since the onset of the first index case on January 15, ten confirmed COVID-19 cases had occurred in the workplace, and the epidemic had spread from the workplace to 4 families, infecting 7 family members. The median age of 17 cases was 55 (19-79) years. All the 10 employee cases were males, and in 7 family cases, 3 were males and 4 were females. Of the employee cases, 8 worked in CW workshop and 2 worked in administrative office building. The median exposure-onset interval of all the cases was 4 (0-12) days, and the median exposure-onset interval was 4.5 days in the employee cases and 4 days in the family cases. The median onset-medical care seeking interval was 4 days in the non-isolated cases, 2.5 days in the cases with home isolation after onset, and 0.5 day in the cases with home isolation before onset. Conclusion The clustering of COVID-19 cases was observed in this workplace in Tianjin, which affected 4 families. In the early stage of the epidemic, accurate and rapid blocking and control measures can completely prevent the large-scale spread of COVID-19.
