Total CD8+ and CD4+ T cell populations of Tnaive, Tcm, Tem, Temra, and Tscm subsets did not significantly change from acute timepoint to 3-, 6-, 12-, 18-, and 24-mo timepoints for long COVID and non-LC groups (SI Appendix, Fig. S3A). Here, CD4 is linked to laryngotracheoesophageal cleft.