[Practical aspects of vaccination in elderly subjects].

The elderly subjects are at high risk of infection due to decreased immune responses and institutionalization. Studies show the effectiveness of influenza vaccination every year in subjects over 65 years, and pneumococcal vaccination every 5 years in patients with risk factors. Vaccinations against diphtheria low dose, tetanus, and polio should be renewed every 10 years. Pertussis should be catched-up in every adult not vaccinated since more than 10 years. Admission in institution, a pre-travel consultation and hospitalization for an infectious disease must be an opportunity to offer vaccination, especially among the frail elderly subjects with comorbidities.