CD8A and major depressive disorder: Furthermore, 23 outcomes were consistently positive (p < 0.05), four (QoL, recurrence of SARS-CoV-2 viral RNA positivity, abnormality rate of chest CT manifestations, and CD8 levels) were consistently negative (p > 0.05), and five (anxiety score, depression score, total effective rate, TCM syndrome score, and CD4/CD8) were inconsistent.