Omicron variant

Impact of the additional/booster dose of COVID-19 vaccine against severe disease during the epidemic phase characterized by the predominance of the Omicron variant in Italy, December 2021 - May 2022

Vaccine effectiveness (VE) against emerging SARS-CoV-2 variants is a growing issue. The aim of this work is to evaluate the impact of the COVID-19 additional/booster dose against COVID-19-related symptoms, hospitalization, and death using …