1. Immune memory in convalescent patients with asymptomatic or mild COVID-19
- Author
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Quan-Xin Long, Yan-Jun Jia, Xin Wang, Hai-Jun Deng, Xiao-Xia Cao, Jun Yuan, Liang Fang, Xu-Rong Cheng, Chao Luo, An-Ran He, Xiao-Jun Tang, Jie-li Hu, Yuan Hu, Ni Tang, Xue-Fei Cai, De-Qiang Wang, Jie Hu, Jing-Fu Qiu, Bei-Zhong Liu, Juan Chen, and Ai-long Huang
- Subjects
Cytology ,QH573-671 - Abstract
Abstract It is important to evaluate the durability of the protective immune response elicited by primary infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Here, we systematically evaluated the SARS-CoV-2-specific memory B cell and T cell responses in healthy controls and individuals recovered from asymptomatic or symptomatic infection approximately 6 months prior. Comparatively low frequencies of memory B cells specific for the receptor-binding domain (RBD) of spike glycoprotein (S) persisted in the peripheral blood of individuals who recovered from infection (median 0.62%, interquartile range 0.48-0.69). The SARS-CoV-2 RBD-specific memory B cell response was detected in 2 of 13 individuals who recovered from asymptomatic infection and 10 of 20 individuals who recovered from symptomatic infection. T cell responses induced by S, membrane (M), and nucleocapsid (N) peptide libraries from SARS-CoV-2 were observed in individuals recovered from coronavirus disease 2019 (COVID-19), and cross-reactive T cell responses to SARS-CoV-2 were also detected in healthy controls.
- Published
- 2021
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