[Success evaluation of the voluntary influenza vaccination by comparison of number of patients. Selection or immunization effect?].
D005500:Follow-Up Studies; D005860:Germany, West; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D009787:Occupational Medicine; D014611:Vaccination
D007252:Influenza Vaccines
Erfolgsbeurteilung der freiwilligen Grippeschutzimpfung durch Krankenstandsvergleich. Selektions- oder Immunisierungeseffekt?