RT Journal Article SR Electronic(1) A1 Martínez-Baz, Iván A1 Navascués, Ana A1 Casado , Itziar A1 Aguinaga, Aitziber A1 Ezpeleta, Carmen A1 Castilla , Jesús YR 2021 T1 Simple models to include influenza vaccination history when evaluating the effect of influenza vaccination JF Eurosurveillance VO 26 IS 32 SP 2001099 OP DO https://doi.org/10.2807/1560-7917.ES.2021.26.32.2001099 UL https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.32.2001099