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