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. 2021 Jul 20;12:708184. doi: 10.3389/fimmu.2021.708184

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Copyright © 2021 Shi, Weng, Wu, Dai, Luo, Chen, Zhu, Lu, Cheng, Chen, Liu, Wu, Wu, Jin, Guo, Chen, Wu, Yao and Zheng

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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Cumulative seroconversion rates of RBD, S2, and N specific IgG (A–C), IgM (D–F), and IgA (G–I) in patients with different clinical types. Patients were divided into two groups, including low severity patients (blue) with mild and moderate severity and high severity patients (red) with severe and critically ill severity. P values were determined using the Log-Rank test. All P values in this figure are greater than 0.05. Ig, immunoglobulin; N, nucleocapsid protein; RBD, receptor-binding domain; S, spike.