Effectiveness against severe COVID-19 of a seasonal booster dose of bivalent (original/Omicron BA.4-5) mRNA vaccines in persons aged ≥60 years: Estimates over calendar time and by time since administration during prevalent circulation of different Omicron subvariants, Italy, 2022–2023
Author:
Fabiani MassimoORCID,
Mateo-Urdiales AlbertoORCID,
Sacco Chiara,
Fotakis Emmanouil Alexandros,
Battilomo Serena,
Petrone DanieleORCID,
Del Manso Martina,
Bella Antonino,
Riccardo Flavia,
Stefanelli Paola,
Palamara Anna Teresa,
Pezzotti Patrizio
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