IFNG and obesity disorder: Obesity does not fully suppress the ability of Vγ9Vδ2 T cells to function, as the potent phosphoantigen, 1-Hydroxy-2-methyl—buten-4yl 4-diphosphate (HDMAPP), is able to stimulate IFN-γ production by Vγ9Vδ2 T cells isolated from obese patients.