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. 2020 Nov 12;7:575439. doi: 10.3389/fmed.2020.575439

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Copyright © 2020 Zhu, Huang, Tang, Nussler and Zheng.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The relationship between comorbidities and the conversion time from real-time PCR (rtPCR) positive to negative during antiviral treatment. Patients were divided by different used antiviral drugs, and the conversion time from rtPCR positive to negative of patients with or without comorbidities was compared. Patients with comorbidities had a longer time of rtPCR conversion than patients without comorbidities throughout antiviral drug treatment. Data are presented as mean ± SEM. The significance was determined as *p < 0.05.