CD8A and infection: In contrast, HCMV+ individuals, even at a distance from primary infection, display no significant difference in the percentages of CD4 versus CD8 T cells (mean values: 48.9% vs. 51.1% for CD4 and CD8 T cells, respectively, from four HCMV+ individuals), indicative of an HCMV-induced CD8 T cell inflation.