IL15 and lymphoma: In the presence of these antibodies, KIR2DS2high NK cells from healthy donors primed overnight with 1 ng/mL IL-15 showed significantly higher CD107a (p<0.0001) (Figures 2A, B) and IFNγ (p<0.0001, p<0.001 or p<0.01) (Figure 2C) expression compared to the other NK cell subsets in accordance with previous reports against lymphoma cell lines (25).