title: [Placebo-controlled study on effectiveness of influenza vaccination?].
authors.forename: T A
authors.initials: TA
authors.lastname: Wagner
mesh_terms: D000368:Aged; D002986:Clinical Trials as Topic; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000517:prevention & control*; D010919:Placebos; D014611:Vaccination
chemical_list: D007252:Influenza Vaccines; D010919:Placebos
vernacular_title: Placebo-kontrollierte Untersuchung zur Wirksamkeit der Influenza-Schutzimpfung?