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10.1371/journal.pone.0245532

http://scihub22266oqcxt.onion/10.1371/journal.pone.0245532
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33493185!7833159!33493185
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suck abstract from ncbi


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pmid33493185      PLoS+One 2021 ; 16 (1): e0245532
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  • T cell response to SARS-CoV-2 infection in humans: A systematic review #MMPMID33493185
  • Shrotri M; van Schalkwyk MCI; Post N; Eddy D; Huntley C; Leeman D; Rigby S; Williams SV; Bermingham WH; Kellam P; Maher J; Shields AM; Amirthalingam G; Peacock SJ; Ismail SA
  • PLoS One 2021[]; 16 (1): e0245532 PMID33493185show ga
  • BACKGROUND: Understanding the T cell response to SARS-CoV-2 is critical to vaccine development, epidemiological surveillance and disease control strategies. This systematic review critically evaluates and synthesises the relevant peer-reviewed and pre-print literature published from 01/01/2020-26/06/2020. METHODS: For this systematic review, keyword-structured literature searches were carried out in MEDLINE, Embase and COVID-19 Primer. Papers were independently screened by two researchers, with arbitration of disagreements by a third researcher. Data were independently extracted into a pre-designed Excel template and studies critically appraised using a modified version of the MetaQAT tool, with resolution of disagreements by consensus. Findings were narratively synthesised. RESULTS: 61 articles were included. 55 (90%) studies used observational designs, 50 (82%) involved hospitalised patients with higher acuity illness, and the majority had important limitations. Symptomatic adult COVID-19 cases consistently show peripheral T cell lymphopenia, which positively correlates with increased disease severity, duration of RNA positivity, and non-survival; while asymptomatic and paediatric cases display preserved counts. People with severe or critical disease generally develop more robust, virus-specific T cell responses. T cell memory and effector function has been demonstrated against multiple viral epitopes, and, cross-reactive T cell responses have been demonstrated in unexposed and uninfected adults, but the significance for protection and susceptibility, respectively, remains unclear. CONCLUSION: A complex pattern of T cell response to SARS-CoV-2 infection has been demonstrated, but inferences regarding population level immunity are hampered by significant methodological limitations and heterogeneity between studies, as well as a striking lack of research in asymptomatic or pauci-symptomatic individuals. In contrast to antibody responses, population-level surveillance of the T cell response is unlikely to be feasible in the near term. Focused evaluation in specific sub-groups, including vaccine recipients, should be prioritised.
  • |COVID-19/complications/immunology/*pathology/virology[MESH]
  • |Host-Pathogen Interactions[MESH]
  • |Humans[MESH]
  • |Immunity, Cellular[MESH]
  • |Lymphopenia/etiology/immunology/*pathology/virology[MESH]
  • |SARS-CoV-2/immunology/*physiology[MESH]


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