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. 2020 Mar 19;97:212–214. doi: 10.1016/j.ijid.2020.03.007

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© 2020 The Author(s)

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Chronological changes of SARS-CoV-2 gene nucleic acid detection of a 54-year-old man with confirmed COVID-19.

The time point in the upper blue dotted frame refers to changes of SARS-CoV-2 gene nucleic acid detection during the hospitalization, and the time point in the lower red dotted frame means changes of SARS-CoV-2 gene nucleic acid testing after discharge and followed up at a designated medical unit.

TS, sample of throat swab.

Sp, sample of sputum.

Fe, sample of feces.

+ refers to positive.

- refers to negative.

± refers to weakly positive, which should be concerned and followed up.