Initial assessment of the COVID-19 vaccination’s impact on case numbers, hospitalisations and deaths in people aged 80 years and older, 15 EU/EEA countries, December 2020 to May 2021 Nicolay, Nathalie and Innocenti, Francesco and Beauté, Julien and Učakar, Veronika and Grgič Vitek, Marta and Poukka, Eero and Hannila-Handelberg, Tuula and Gauci, Charmaine and Melillo, Tanya and Georgakopoulou, Theano and Jarkovsky, Jiri and Slezak, Pavel and Delgado-Sanz, Concepción and Olmedo-Lucerón, Carmen and Suija, Heleene and Liausediene, Rasa and O’Lorcain, Piaras and Murphy, Niamh and Peralta-Santos, André and Casaca, Pedro and Gregoriou, Ioanna and Bundle, Nick and Spiteri, Gianfranco and Ravasi, Giovanni, Eurosurveillance, 26, 2101030 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.48.2101030