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. 2021 Nov 18;102:108383. doi: 10.1016/j.intimp.2021.108383

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Published by Elsevier B.V.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig — 1. Enumeration of lymphocytes in peripheral whole blood. Peripheral whole blood samples were collected from participants and then were stained with 6-Color TBNK Reagent or APC-conjugated anti-human CD45RO to determine the counts of lymphocytes using a flow cytometer. The expression of CD3 (A), CD4 (B), CD8 (C), B cells (D) and CD4 ⁺ CD45RO ⁺ memory T cells (E) were analyzed, and CD4/CD8 ratio (F) were calculated. N = 24, *P < 0.05, **P < 0.01.