ISG15 and viral infectious disease: A total of 14 genes (BCL2, ISG15, EIF2AK2, IFIH1, IRF7, ISG20, IFI35, IFI44, MX1, MX2, RSAD2, STAT1, STAT2 and TRIM5) out of 61 overexpressed by T cells (P < 1e-16, test for enrichment) were associated to the response to a viral infection.