Figure 3. Flow cytometry analyses for the distribution of the memory subsets of the CD4⁺ and CD8⁺ T cells.

Panel A: data from a representative animal from each of the three groups with different viral loads: Long-term non-progressors (LTNP), chronic viremia (Chronic), and highly viremic (Viremic). The memory cells were differentiated on the basis of CD28 and CD95 expression into naïve (Tn CD28⁺ CD95⁻), central memory (Tcm CD28⁺ CD95⁺) and effector memory (Tem CD28⁻ CD95⁺) subsets. Panels B and C: comparison of the average values for the numbers of the different memory subsets of CD4⁺ T cells (B) and CD8⁺ T cells (C) in all the animals tested in the LTNP, Chronic and Viremic groups of monkeys. The data are shown as the mean ± SEM. The Horizontal bars represent the group mean, error bars represent SEM. Statistical differences between groups are indicated by the p values.