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. 2021 May 28;11:667487. doi: 10.3389/fcimb.2021.667487

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Copyright © 2021 Wang, Fan, Chai, Cheng, Wang, Cao and Hu

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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Correlation analysis between peripheral lymphocyte subpopulations and cytokines in COVID-19 patients. The relationships between the counts of lymphocytes, CD3+ T cells, CD4+ T cells, CD8+ T cells, B cells, NK cells and serum levels of IFN-γ (A) and IL-2 (B) in COVID-19 patients were assessed. Solid line: fitted curve; dashed line: 95% confidence interval (CI) of the fitted curve. A p value<0.05 was considered as statistically significant.