title: [Effectiveness of vaccination in high risk population].
authors.forename: Juan Francisco
authors.initials: JF
authors.lastname: Sánchez-Muñoz
authors.forename: José María
authors.initials: JM
authors.lastname: Saponi-Cortés
authors.forename: Alberto
authors.initials: A
authors.lastname: Costo-Campoamor
mesh_terms: D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000401:mortality / Q000517:prevention & control*; D012307:Risk Factors; D013030:Spain
chemical_list: D007252:Influenza Vaccines