Human Vδ2 T cells were expanded from peripheral blood mononuclear cells using Tetrakis‐pivaloyloxymethyl 2‐(thiazole‐2‐ylamino) ethylidene‐1,1‐bisphosphonate (PTA) plus IL-2 for 13 days, before used to test for cytotoxicity against mesothelioma cell lines. Here, IL2 is linked to mesothelioma.