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| The characteristics of imported COVID-19 cases from abroad toZhejiang Province |
| QI Xiaohua, LIU Biyao, WANG Zhen, ZHANG Renjie
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| Department of Public Health Emergency Response, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang 310051, China |
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Abstract Objective To analyze the characteristics of imported coronavirus disease 2019 ( COVID-19 ) cases from abroad to Zhejiang Province,so as to provide basis for improving the prevention and control of COVID-19 imported epidemic. Methods The imported COVID-19 cases reported by Zhejiang Province from September 1, 2020 to January 28, 2021 were extracted from the National Diseases Prevention and Control Information System.The case information were checked with the field epidemiological investigation reports. A descriptive analysis was adopted for the epidemiological characteristics of the imported COVID-19 cases,including time,spatial and population distribution,import source, etc. Results Zhejiang Province reported 136 cases of COVID-19 from abroad from September 1, 2020 to January 28, 2021, with 38 confirmed cases ( 27.94% ) and 98 asymptomatic cases ( 72.06% ). No deaths and related local cases were reported. A total of 10 confirmed cases and 58 asymptomatic cases were positive for nucleic acid tests at the port of entry, 7 cases were positive after the medical observation period, and the other cases were positive during the medical observation period. Cases were reported in each month. The age of the cases was mainly 20 to 39 years old, accounting for 61.03% (83 cases). The occupations were mainly business services, accounting for 33.09% ( 45 cases ). The 136 imported cases came from 32 countries, among which 26 cases came from Philippines. Most of the imported cases enter China through Hangzhou, Ningbo and Shanghai. Conclusions The imported epidemic situation in Zhejiang Province is sporadic, with large proportion of asymptomatic infections. The imported cases are mainly business service providers and come from Philippines. Therefore, measures such as nucleic acid tests and isolation of entry personnel at ports should be strengthened to prevent the spread of the local epidemic caused by imported cases.
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Received: 21 February 2021
Revised: 10 March 2021
Published: 04 June 2021
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