SLC13A4 and viral infectious disease: The genes in low SLC13A4 expression group were principally involved in immunity-related activities, viral diseases, typical tumor pathways and metabolism, including antigen processing and presentation, regulatory T cells, interleukin-family members, viral myocarditis, epithelial mesenchymal transition (EMT), glycosaminoglycan biosynthesis chondroitin sulfate, among others.