Figure 3

The naïve T cell subsets of old ChRM have an increased level of proliferation. (a) Dot plots shows increased levels of CD38⁺HLA-DR⁺CD4⁺ T cells, Ki67⁺CD4⁺ T cells, Ki67⁺CD4⁺ naïve T cells, Ki67⁺CD8⁺ T cells and Ki67⁺CD8⁺ naïve T cells in old (n = 8, blue square) compared with young (n = 6, red circle) animals during early infection. P (dpi) < 0.05, statistically significant differences over the acute or postacute phase, as determined by two-way ANOVA. P (age) < 0.05, statistically significant differences between the young and old groups, as determined by two-way ANOVA.