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. 2022 Jan 27;8:791163. doi: 10.3389/fmed.2021.791163

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Copyright © 2022 Wu, Zhang, Liu, Liu, Zhang, Zhang, Chen, He, Li, Xu and Liu.

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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Comparison of the Ct value between URT and LRT samples upon admission to the ICU. URT, upper respiratory tract; LRT, lower respiratory tract; ICU, intensive care unit; Ct, cycle threshold.