Fig. 2

PD-L1 supports development of long-lived memory cells following MCMV infection. Brain mononuclear cells were harvested from infected WT and PD-L1 KO mice and were analyzed for expression of CD127 at the indicated time points (three animals per group per time point from two separate experiments). a Representative contour plots depict the percentage of CD127-positive cells, along with CD103⁺ expression gated on CD8⁺ T cells. b Data show absolute number (mean ± SD) of CD127⁺ cells within the infiltrating lymphocyte population pooled from two independent experiments. **p < 0.001 WT versus PD-L1 KO at 14 dpi and *p < 0.01 WT versus PD-L1 KO at 30 dpi