AUTHOR=Vineis Paolo , Salmaso Stefania TITLE=The Origin of Sars-CoV-2: Why It Matters JOURNAL=Frontiers in Public Health VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2021.719914 DOI=10.3389/fpubh.2021.719914 ISSN=2296-2565