The Analysis of Patterns of Two COVID-19 Outbreak Clusters in China

Since the emergence of COVID-19, there have been many local outbreaks with foci at shopping malls in China. We compared and analyzed the epidemiological and spatiotemporal characteristics of local COVID-19 outbreaks in two commercial locations, a department store building (DSB) in Baodi District, Ti...

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Bibliographic Details
Published in:International journal of environmental research and public health 2022-04, Vol.19 (8), p.4876
Main Authors: Li, Wenning, Gong, Jianhua, Zhou, Jieping, Fan, Hongkui, Qin, Cheng, Gong, Yujiang, Hu, Weidong
Format: Article
Language:English
Subjects:
China - epidemiology
Coronaviruses
COVID-19
COVID-19 - epidemiology
COVID-19 vaccines
Department stores
Disease control
Disease Outbreaks
Disease prevention
Disease transmission
Epidemics
Epidemiology
Humans
Immunization
Methods
Nucleic acids
Outbreaks
SARS-CoV-2
Shopping
Shopping centers
Shopping malls
Trends
Viruses
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Summary:Since the emergence of COVID-19, there have been many local outbreaks with foci at shopping malls in China. We compared and analyzed the epidemiological and spatiotemporal characteristics of local COVID-19 outbreaks in two commercial locations, a department store building (DSB) in Baodi District, Tianjin, and the Xinfadi wholesale market (XFD) in Fengtai District, Beijing. The spread of the infection at different times was analyzed by the standard deviation elliptical method. The spatial transfer mode demonstrated that outbreaks started at the center of each commercial location and spread to the periphery. The number of cases and the distance from the central outbreak showed an inverse proportional logarithmic function shape. Most cases were distributed within a 10 km radius; infected individuals who lived far from the outbreak center were mainly infected by close-contact transmission at home or in the workplace. There was no efficient and rapid detection method at the time of the DSB outbreak; the main preventative measure was the timing of COVID-19 precautions. Emergency interventions (closing shopping malls and home isolation) were initiated five days before confirmation of the first case from the shopping center. In contrast, XFD closed after the first confirmed cases appeared, but those infected during this outbreak benefitted from efficient nucleic acid testing. Quick results and isolation of infected individuals were the main methods of epidemic control in this area. The difference in the COVID-19 epidemic patterns between the two shopping malls reflects the progress of Chinese technology in the prevention and control of COVID-19.
ISSN:1660-4601
1661-7827
1660-4601
DOI:10.3390/ijerph19084876