IL2 and neoplasm: There was a significant decrease in tumor weight for the LV-shFDPS vs LV-shFDPS + Vδ2 groups from 1.25 to 0.23 g (5.5-fold decrease) and 1.31 to 0.04 g (32-fold decrease) for the LV-shFDPS-IL2 vs LV-shFDPS-IL2 + Vδ2 groups (**** p<0.0001, **** p<0.0001, N=8) (Figure 4D).