https://scholar.google.com/scholar_lookup?title=SARS-CoV-2+Breakthrough+Infections+in+Health+Care+Workers:+An+Italian+Retrospective+Cohort+Study+on+Characteristics,+Clinical+Course+and+Outcomes&author=De+Maria,+L.&author=Sponselli,+S.&author=Caputi,+A.&author=Stefanizzi,+P.&author=Pipoli,+A.&author=Giannelli,+G.&author=Delvecchio,+G.&author=Tafuri,+S.&author=Inchingolo,+F.&author=Migliore,+G.&publication_year=2023&journal=J.+Clin.+Med.&volume=12&pages=628&doi=10.3390/jcm12020628