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Ratios of CD4+ T-cells producing IFN-γ (A), TNF-α (B), and CD8+ T-cells (C) producing TNF-α in response to the SARS-CoV-2 peptide pool (SP), angiotensin II (Ang II), or both of SP and Ang II stimulation in PBMCs from recovered COVID-19 patients (n = 5). The mean of the T-cells ratios was measured as the percentage of T-cells producing cytokine in each group to the percentage of T-cells producing cytokine in the control group.
