Besides, a number of genes found in both mild and severe COVID-19 cases (IFI27, IFITM3, IFI6, IFIT3, MX1, IFIT1, OASL, IFI30, OAS1) and genes only in severe cases (S100A8, IFI44, IFI44L, CXCL8, CCR1, PLSCR1, EPSTI1, FPR1, OAS2, OAS3, IL1RN, TYMP, BCL2A1) are reported as well. Here, IL1RN is linked to COVID-19.