Immune infiltration levels of CD8+ T cells, B cells, neutrophils, macrophages, and myeloid dendritic cells were positively correlated with GBP1 expression in most cancer types, especially BLCA, CESC, COAD, HNSC, KICH, LUAD, LUSC, SKCM, and PRAD (Figure 2D, E). The gene discussed is CD8A; the disease is cancer.