Fabrizio Ernesto Pregliasco is Associate Professor of General and Applied Hygiene at the Virology Section of the Department of Biomedical Sciences for Health at the University of Milan, Milan, Italy. After graduating with distinction in 1986, he specialized in Hygiene, Preventive Medicine, and Toxicology and has worked since 1991 as a university researcher in General and Applied Hygiene at the former Institute of Virology, University of Milan. Since 1995–1996, he has lectured on hygiene and preventive medicine in the Faculty of Medicine and Surgery at the University of Milan. From 1989 to date, he has held positions in the ANPAS organization (Associazione Nazionale Pubbliche Assistenze), where he was National President from 2013 to 2022 and is currently a former president. He is currently engaged in studying the etiological, epidemiological, and preventive aspects of certain viral diseases—in particular, influenza, SARS-CoV-2, hepatitis, and infections caused by poliovirus and retrovirus.