Investigation on a cluster epidemic of COVID-19 in a supermarket in Liaocheng, Shandong province

• Published in: Zhōnghuá liúxíngbìng zázhì Vol. 41; no. 12; p. 2024
• Main Authors: Zhang, J Z, Zhou, P, Han, D B, Wang, W C, Cui, C, Zhou, R, Xu, K X, Liu, L, Wang, X H, Bai, X H, Jiang, X K
• Format: Journal Article
• Language: Chinese
• Published: China 10.12.2020
• Subjects: China - epidemiology; Cities; COVID-19 - epidemiology; Epidemics; Humans; SARS-CoV-2; Supermarkets; China; Cities; Asymptomatic patient; COVID-19; Cluster epidemic; Community transmission; Imported case
• ISSN: 0254-6450
• DOI: 10.3760/cma.j.cn112338-20200228-00206

To explore clustered epidemic of COVID-19 in Liaocheng city and analyze infection status and chain of transmission of the cases. A joint investigation team of emergency response for COVID-19 epidemic by CDC professional workers of Liaocheng city and district at two levels on January 30, 2020. According to a indicator case from ZH supermarkets, close contacts and related subjects were tracked and screened on February 1, including ZH supermarket employees, family members having contact history with related cases during January 13-26, supermarket clients during January 16-30 and family members of related cases. an epidemiological investigation was carried on and their swab of nose/throat were collected and were sent to Liaocheng CDC laboratory, real-time fluorescence quantitative RT-PCR was used to detect nucleic acids of SARS-CoV-2. a total of 8 437 people were screened during January 30 to February 9, 2020 (120 employees of supermarket, 93 family members, and 8224 clients of supermarket). The epidemic was caus