The immune infiltration level was quantified by an immune score, and its correlation with SLC19A1 was significantly negative in 19 types of analyzed cancers (n = 19/39), including TCGT, SKCM, ACC, GBM, BLCA, PRAD, ESCA, CESC, STAD, LIHC, COAD, LGG, STES, READ, BRCA, THCA, LUSC, OV, and LUAD (Figure 5A). The gene discussed is SLC19A1; the disease is cancer.