Influenza vaccine effectiveness against laboratory-confirmed influenza in hospitalised adults aged 60 years or older, Valencia Region, Spain, 2017/18 influenza season Mira-Iglesias, Ainara and López-Labrador, F Xavier and Baselga-Moreno, Víctor and Tortajada-Girbés, Miguel and Mollar-Maseres, Juan and Carballido-Fernández, Mario and Schwarz-Chavarri, Germán and Puig-Barberà, Joan and Díez-Domingo, Javier and on behalf of the Valencia Hospital Network for the Study of Influenza and Respiratory Viruses Disease, Eurosurveillance, 24, 1800461 (2019), https://doi.org/10.2807/1560-7917.ES.2019.24.31.1800461