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. 2023 Feb 20;14:1079960. doi: 10.3389/fimmu.2023.1079960

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Copyright © 2023 Zheng, Ma, Yang, Liao, Cheng, Xue, Li, Fang, Lin, Zhang, Huang, Hu, Ma and Sun

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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Timepoint of patient follow-up. The abscissa is the patient’s enrolment number, and the ordinate is the day of onset. AP, asymptomatic patients; MP, mildly patients; SP, severely patients.