CD8A and COVID-19: Of note, circulating CM and EM CCR6+CD8+ T cells were decreased in patients with acute COVID-19 compared to COVID-19 convalescents (9.49% (6.71; 13.85) vs. 13.91% (8.70; 20.15) with p = 0.002 and 17.11% (8.39; 25.39) vs. 29.79% (19.09; 43.85), p < 0.001, respectively) and healthy volunteers (9.49% (6.71; 13.85) vs. 12.73% (8.22; 19.58) with p = 0.012 and 17.11% (8.39; 25.39) vs.26.35% (12.84; 47.73), p = 0.001, respectively).