AUTHOR=Wendt Frank R , De Lillo Antonella , Pathak Gita A , De Angelis Flavio , COVID-19 Host Genetics Initiative , Polimanti Renato TITLE=Host Genetic Liability for Severe COVID-19 Associates with Alcohol Drinking Behavior and Diabetic Outcomes in Participants of European Descent JOURNAL=Frontiers in Genetics VOLUME=Volume 12 - 2021 YEAR=2021 URL=https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2021.765247 DOI=10.3389/fgene.2021.765247 ISSN=1664-8021 ABSTRACT=Risk factors and long-term consequences of COVID-19 infection are unclear but can be investigated with large-scale genomic data. To distinguish correlation from causation, we performed in-silico analyses of three COVID-19 outcomes (N>1,000,000). We show genetic correlation and putative causality with depressive symptoms, metformin use (genetic causality proportion (gĉp) with severe respiratory COVID-19=0.576, p=1.07x10-5 and hospitalized COVID-19=0.713, p=0.003), and alcohol drinking status (gĉp with severe respiratory COVID-19 =0.633, p=7.04x10-5 and hospitalized COVID-19=0.848, p=4.13x10-13). COVID-19 risk loci associated with several hematologic biomarkers. Comprehensive findings inform genetic contributions to COVID-19 epidemiology, molecular mechanisms, and risk factors and potential long-term health effects of severe response to infection.