Risk of Infection and Duration of Protection after the Booster Dose of the Anti-SARS-CoV-2 Vaccine BNT162b2 among Healthcare Workers in a Large Teaching Hospital in Italy: Results... oleh Domenico Pascucci, Adriano Grossi, Alberto Lontano, Eleonora Marziali, Mario Cesare Nurchis, Vincenzo Maria Grassi, Matteo Raponi, Giuseppe Vetrugno, Giovanni Capelli, Giovanna Elisa Calabrò, Domenico Staiti, Maurizio Sanguinetti, Gianfranco Damiani, Patrizia Laurenti