Figure 2. Frequencies of CD4⁺ and CD8⁺ T cells in BAL and PBMCs.

Red and blue circles indicate BAL and PBMCs, respectively. (A) Higher frequencies of CD4⁺ T cells in PBMCs compared with BAL at all indicated time points (P = 0.01). (B) Higher frequencies of CD8⁺ T cells in BAL compared with PBMCs at all indicated time points (P = 0.01). Each data point represents an animal (n = 6), and horizontal lines indicate the mean with SEM. Wilcoxon’s matched-pairs signed rank test was used to compare the frequencies of CD4⁺ and CD8⁺ T cells between BAL and PBMCs.