The Effectiveness of COVID-19 Vaccines During the Pre-Omicron and Omicron Periods: A Retrospective Test-Negative Case–Control Study

The Effectiveness of COVID-19 Vaccines During the Pre-Omicron and Omicron Periods: A Retrospective Test-Negative Case–Control Study

Background: The aim of this study was to estimate the effectiveness of original and bivalent COVID-19 vaccines in reducing COVID-19-associated hospitalizations among the adult population of Turin, Italy. Methods: We conducted a retrospective, test-negative, case–control study of 5768 adults aged ≥50...

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Main Authors: Romeo Brambilla, Renata Gili, Federica Vigna Taglianti, Jacopo Lenzi, Matteo Riccò, Roberto Burioni, Mariaelisabetta Scarvaglieri, Rachele Rocco, Vittorina Buttafuoco, Rosa Maria Teresa Antonia Cristaudo, Davide Gori
Format: Article
Language:English
Published: MDPI AG 2024-10-01
Series:Vaccines
Subjects:
vaccination
COVID-19
effectiveness
test-negative design
booster
bivalent vaccine
Online Access:https://www.mdpi.com/2076-393X/12/11/1245
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https://www.mdpi.com/2076-393X/12/11/1245

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