Gómez, VerónicaKislaya, IrinaGuiomar, RaquelPanarra, António CarlosPoças, JoséPechirra, PedroNunes, BaltazarMachado, AusendaEVA Working Group2019-02-132019-07-012018-09-12http://hdl.handle.net/10400.18/5783Vaccination is one of the main measures to prevent influenza.engInfluenzaVaccine EffectivenessPortuguese Elderly2017/2018 SeasonContexto HospitalarGripeEfetividadeVacinaIdososCuidados de Saúde PrimáriosCuidados de SaúdePortugalInfluenza Vaccine Effectiveness in the Portuguese elderly during 2017-18 seasonconference object