DPP9 and idiopathic pulmonary fibrosis: ,12 Using the first COVID-19 GWAS published by the Severe Covid-19 GWAS Group13 and the highest-powered IPF GWAS at the time,14 we identified a shared signal in DPP9, rs12610495, associated at a suggestive threshold with severe COVID-19 (p value = 5.20 × 10−6)13 and at genome-wide significance with IPF (p value = 2.92 × 10−12).12