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. 2021 Nov 10;12:789374. doi: 10.3389/fmicb.2021.789374

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Copyright © 2021 Tian, Jiang, Zhang, Lu, Li, Liu 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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Evaluation of the changes in neutralizing antibody titers in 156 serum samples. According to the classification at different time points after convalescence, (A) reflects the change in the neutralization titer of serum from convalescent patients, and the y-axis represents the log2 of the neutralization titer. (B) Reflects the change in the proportion of the neutralization titer in serum; (C–F) indicates the analysis of the correlations of S protein IgG and IgM with neutralizing antibodies, respectively. ***P < 0.001.