FIG. 3.

Mean and standard deviations of percentages and absolute CD4⁺CD95^– (naive) cells (A), CD4⁺CD95⁺ (memory) cells (B), CD8⁺CD95^– (naive) cells (C), and CD8⁺CD95⁺ (memory) cells (D) are shown from week –6 to week 64 post-SIVmac251 infection. Absolute lymphocyte counts were determined with a VetScan HMT Hematology Analyzer and the absolute numbers of lymphocyte populations were determined by the following equation: (Percent CD marker expression × absolute CD4 or CD8 lymphocyte count)/100. There were no statistically significant differences between the groups [(A) p = 0.65, power = 20%; (B) p = 0.89, power = 15%; (C) p = 0.47, power = 40%; (D) p = 0.52, power = 37%]. The arrow indicates the day of SIV infection.