DPP9 and COVID-19: In this work, we detected the clinical significance of IFNAR2 (2 SNPs), SLC6A20 (1 SNP) with respect to COVID-19 susceptibility and ADAM17 (2 SNPs), TMPRSS2 (1 SNP), TYK2 (1 SNP), DPP9 (1 SNP) with respect to the severity of the disease.