AUTHOR=Bruyneel Arnaud , Dauvergne Jérôme E. , Dauby Nicolas , Goffard Jean-Christophe , Rea Andrea , Racape Judith TITLE=Social health gradient and risk factors among patients hospitalized for COVID-19 and pre-pandemic respiratory infections. A linked national individual case-control study in Belgium JOURNAL=Frontiers in Public Health VOLUME=12 YEAR=2024 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2024.1426898 DOI=10.3389/fpubh.2024.1426898 ISSN=2296-2565