CD8A and COVID-19: 99), p = 0.005) were lower than after COVID-19 but remained higher than the pre-COVID-19 CD4 count (644.0 (478.5, 813.0) vs. 562.0 (401.5, 741.0), p < 0.001) and CD4/CD8 ratio (0.77 (0.59, 1.08) vs. 0.65 (0.47, 0.90), p < 0.001) (Figure 3A,B).