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Updated: Dec 25, 2025

Quantification and Whole Genome Characterization of SARS-CoV-2 RNA in Wastewater and Air Samples
Published on: June 30, 2023
SARS-CoV-2 turned positive in a discharged patient with COVID-19 arouses concern regarding the present standards for
Jing-Feng Zhang1, Kun Yan2, Hong-Hua Ye2
1Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, China; Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China.
Abstract:
An outbreak of coronavirus disease (COVID-19) in Wuhan, China caused by SARS-CoV-2 has led to a serious epidemic in China and other countries, resulting in worldwide concern. With active efforts of prevention and control, more and more patients are being discharged. However, how to manage these patients normatively is still challenging. This paper reports an asymptomatic discharged patient with COVID-19 who retested positive for SARS-CoV-2, which arouses concern regarding the present discharge standards of COVID-19.
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