Risk reduction of hospitalisation and severe disease in vaccinated COVID-19 cases during the SARS-CoV-2 variant Omicron BA.1-predominant period, Navarre, Spain, January to March 2022 Martínez-Baz, Iván and Trobajo-Sanmartín, Camino and Miqueleiz, Ana and Casado, Itziar and Navascués, Ana and Burgui, Cristina and Ezpeleta, Carmen and Castilla, Jesús and Guevara, Marcela and the Working Group for the Study of COVID-19 in Navarra, Eurosurveillance, 28, 2200337 (2023), https://doi.org/10.2807/1560-7917.ES.2023.28.5.2200337