IFNG and helminthiasis: We have previously shown the induction of a stably differentiated hybrid T helper population with combined characteristics of Th2 and Th1 cells at the single cell level, namely the co-expression of GATA-3 and Th2 cytokines together with the lineage-specifying transcription factor and signature cytokine of Th1 cells, T-bet and IFN-γ, in experimental helminth infections.