Each of the 6 genes were significantly differentially expressed between patients with viral infections who survived and those who did not, of which 3 genes (DEFA4, BATF, HK3) were higher and 3 genes (TGFBI, LY86, HLA-DPB1) were lower in those who died (Fig. 2d). The gene discussed is LY86; the disease is viral infectious disease.