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. 2021 Aug 24;8:657006. doi: 10.3389/fmed.2021.657006

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Copyright © 2021 Song, Zhao, Zhang, Liu, Zhu, An, Xu, Li, Liu, Tao, Liu, Li and Li.

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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Forrest plot demonstrating the pooled ORs of severe cases in COVID-19 patients with tuberculosis. ORs, odds ratios; TB, tuberculosis; CI, confidence interval; events refer to the occurrence of severe cases.