AUTHOR=Zhang Ren-zi , Deng Wang , He Jing , Song Yu-yan , Qian Chun-fang , Yu Qian , Wang Dao-xin 

TITLE=Case Report: Recurrence of Positive SARS-CoV-2 Results in Patients Recovered From COVID-19

JOURNAL=Frontiers in Medicine

VOLUME=Volume 7 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2020.585485

DOI=10.3389/fmed.2020.585485

ISSN=2296-858X

ABSTRACT=Background: Coronavirus disease 2019 (COVID-19) is spreading throughout the world. Limited data are available for recurrent positive tests for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by nucleic acid detection in patients with long disease duration. 
Methods: We report four cases of COVID-19 with recurrently positive for SARS-CoV-2 during the disease progression.
Results: Our data indicate that patients recovered from COVID-19 showed recurrently positive for SARS-CoV-2 by nucleic acid detection with no symptoms and normal chest CT,.
Conclusions: The dynamic surveillance of SARS-CoV-2 by nucleic acid detection and serological assays is important for asymptomatic patients who might be potentially infectious.