IL2 and neoplasm: When Raji, a human malignant Burkitt’s lymphoma cell line, was incubated with the PTA/IL-2-expanded Vγ9Vδ2 T cells, over 30% of Raji cells were killed by Vγ9Vδ2 T cells at an effect-to-target (E/T) ratio of 200, in which Vγ9Vδ2 T cells exhibited the anti-tumor effect in an E/T ratio-dependent manner.