DPP9 and COVID-19: Recently, genetic loci near L2TFL1, FOXP4, TMEM65, OAS1, KANSL1, DPP9, RAVER1, and IFNAR2 were reported as susceptibility loci for severity to coronavirus disease 2019 (COVID-19), which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) [50].