Epidemic characteristics of the COVID-19 outbreak in Tianjin, a well-developed city in China - 26/08/20
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Highlights |
• | Local transmission of COVID-19 is largely occurring in the well-developed cities. |
• | The epidemic pattern was propagated combined with the common-source outbreak. |
• | COVID-19 mainly occurred within families and a poorly ventilated public place. |
Résumé |
Background |
Coronavirus disease 2019 (COVID-19) is already a pandemic. Few studies investigated the epidemic characteristics of the COVID-19 outbreak in the well-developed cities.
Methods |
Epidemiological data of 136 confirmed COVID-19 cases were collected from the dataset of COVID-19 in Tianjin. All confirmed cases were categorized according to their potential infection sources. Daily numbers of confirmed cases of each category were plotted by date of onset, and the epidemic form of each category was inferred.
Results |
Among the 136 confirmed COVID-19 cases, 48 cases were categorized as imported cases and their close contacts, which were the majority of early cases. A total of 43 cases were found an epidemiological link to the Baodi department store, and they were inferred to be a common-source outbreak. Additionally, 35 cases were considered as familial clusters of COVID-19 cases, and 10 cases were sporadic. The 45 cases were inferred to be a propagated epidemic.
Conclusions |
Local transmission of COVID-19 mainly occurred within families and a poorly ventilated public place in Tianjin. Besides the imported cases, the pattern of local transmission of COVID-19 was a mixture of the propagated epidemic and the common-source outbreak in Tianjin.
Le texte complet de cet article est disponible en PDF.Key Words : SARS-Cov-2, Human-to-human transmission, Epidemic curve
Plan
| Conflicts of interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
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| Funding: This work was supported by the following grants: National Natural Science Foundation of China (NSFC) Grants 81671909 and 81901958 and Zhejiang Provincial Natural Science Foundation of China Grants: LY18H150004, LY19H150004, and LY20H150010. |
Vol 48 - N° 9
P. 1068-1073 - septembre 2020 Retour au numéro
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