Risk of SARS-CoV-2 infection and subsequent hospital admission and death at different time intervals since first dose of COVID-19 vaccine administration, Italy, 27 December 2020 to mid-April 2021 Mateo-Urdiales, Alberto and Spila Alegiani, Stefania and Fabiani, Massimo and Pezzotti, Patrizio and Filia, Antonietta and Massari, Marco and Riccardo, Flavia and Tallon, Marco and Proietti, Valeria and Del Manso, Martina and Puopolo, Maria and Spuri, Matteo and Morciano, Cristina and D’Ancona, Fortunato (Paolo) and Da Cas, Roberto and Battilomo, Serena and Bella, Antonino and Menniti-Ippolito, Francesca and on behalf of the Italian Integrated Surveillance of COVID-19 study group and on behalf of the Italian COVID-19 vaccines registry, Eurosurveillance, 26, 2100507 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.25.2100507