title: [Study of the effectiveness of preventive influenza vaccination based on NYHA stages in patients with cardiovascular diseases].
mesh_terms: D002318:Cardiovascular Diseases / Q000150:complications*; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000517:prevention & control*; D012306:Risk
chemical_list: D007252:Influenza Vaccines
vernacular_title: Effektivitätsprüfung der Influenzaschutzimpfung an Hand der NYHA-Stadien bei Patienten mit Herz-Kreislauf-Erkrankungen.