Enhancing routine immunization efforts for older adults and frail individuals: Good practices during the SARS-CoV-2 pandemic in Italy oleh Andrea Poscia, Giulia Paolorossi, Agnese Collamati, Claudio Costantino, Daniel Fiacchini, Claudio Angelini, Roberto Bernabei, Daniela Cimini, Giancarlo Icardi, Andrea Siddu, Andrea Silenzi, Antonietta Spadea, Davide Liborio Vetrano