A cluster of positive correlations between the three Th1 cytokines was observed in healthy donors and adults with long-term type 1 diabetes, whereas only TNF-α and IFN-γ MAIT cell production correlated with each other in adults with recent-onset type 1 diabetes (Fig. 3c–h and ESM Fig. 3c). This evidence concerns the gene IFNG and type 1 diabetes mellitus.