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. 2021 Apr 12;8:569266. doi: 10.3389/fmed.2021.569266

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Copyright © 2021 Jia, Zhang, Tian, Wang, Zeng, Wang, Liu, Chen, Zhang, He, He 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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IgM and IgG detection among the 24 patients with positive COVID-19 nucleic acid results. (A) The IgM-value of 19 patients was more than 0.88 U/L. (B) The IgG-value of 16 patients was more than 1.02 U/L.