Abstract:Objectives: We examined the relationship between peripheral blood levels of SARS-CoV-2 S1/M-reactive IFN-γ-producing CD4+ and CD8+ T cells, serum levels of biomarkers of clinical severity and mortality in critically ill COVID-19 patients. Methods: Immune responses were monitored in 71 non-consecutive patients (49 male and 22 female; median age, 65 years) by whole-blood flow cytometry (326 specimens). SARS-CoV-2 RNA loads in paired tracheal aspirates [TA] (n=147) were available from 54 patients. Serum levels o… Show more
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