CD8A and infection: Increased expansion of miR-155-OE OT-I CD8+ T cells was also observed in the spleen (1.8 ± 0.3 × 106 versus 5.3 ± 1.4 × 106, scrambled ctrl OT-I versus miR-155 OE OT-I, respectively, p = 0.023) and the mediastinal lymph nodes (MLNs) (0.2 ± 0.4 × 105 versus 0.8 ± 0.3 × 105, scrambled ctrl OT-I versus miR-155 OE OT-I, respectively, p = 0.029) 10 days post-infection (Figures 1C,D).