However, spike-specific CD4+ T cells were mainly of the Tcm phenotype, stable at 3 mo postinfection up to 24 mo or postvaccination (SI Appendix, Fig. S3C), which was the case for both long COVID and non-LC, and influenza-specific CD8+ T cells (SI Appendix, Fig. S3D). This evidence concerns the gene CD8A and influenza.