CD4 and neoplasm: No differences were found in CD4+ T cells in the spleen (α-PD-L1 mAb, 65.4 percent; α-PD-L1 NP, 61.9 percent) or tumor (α-PD-L1 mAb, 13.9 percent; α-PD-L1 NP, 13.5 percent) (Figure 5C).