CD8A and infection: The A2/S269+ CD8+ T cells from the convalescent versus acute subjects had a lower prevalence of TCM-like (mean of 50%) cells, and larger proportions of the TNaïve (mean of 27%) and TSCM (mean of 15%) sets, indicating that A2/S269+CD8+ T cells expressing the optimally responsive TCM phenotype fall off rapidly in blood sampled after the infection has resolved.