• Yan Ma, Qing-Nan Xu, Feng-Li Wang, Xiao-Man Ma, Xiao-Yan Wang, Xiao-Guo Zhang, and Zhong-Fa Zhang.
• Department of Respiratory Medicine, Jinan Infectious Diseases Hospital, Shandong University, 22029# Jing-Shi Road, Jinan, 250021, China.
• Microbes Infect. 2020 May 1; 22 (4-5): 212-217.

AbstractCoronavirus Disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) is continuously and rapidly circulating at present. Asymptomatic patients have been proven to be contagious and thus pose a significant infection control challenge. Here we describe the characteristics of asymptomatic patients with SARS-CoV-2 infection in Jinan, Shandong province, China. A total of 47 patients with confirmed COVID-19 were recruited. Among them, 11 patients were categorized as asymptomatic cases. We found that the asymptomatic patients in Jinan were relatively young and were mainly clustered cases. The laboratory indicators and lung lesion on chest CT were mild. No special factors were found accounting for the presence or absence of symptoms. The presence of asymptomatic patients increased the difficulty of screening. It is necessary to strengthen the identification of such patients in the future.Copyright © 2020 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.

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