title: [The effectiveness of influenza vaccination].
mesh_terms: D000041:Absenteeism; D005859:Germany, East; D006801:Humans; D007252:Influenza Vaccines / Q000592:standards*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D009975:Orthomyxoviridae; D014611:Vaccination
chemical_list: D007252:Influenza Vaccines
vernacular_title: Ein Beitrag zur Effektivität der Grippeschutzimpfung