Some people are at increased risk of problems as a result of already existing illness, age, or immunosuppressive treatment following exposure to vaccine-preventable infections. In addition to conventional diphtheria, tetanus and pertussis vaccines, influenza immunisation, pneumococcal illness and hepatitis B is recommended. In monocentric study, we have estimated the vaccine coverage and the determinant of recommended vaccinations in patients with DC type 1 and type 2, Chronic Kidney Disease (CKD), HIV or Solid Organ Transplants (SAT) in patients with DC type 1 and Type 2. Information from the immunisation was obtained from patients’ and general physicians’ documentation and from the Flamenco registration of immunisation. All recommended immunizations were received by less than 10%. In general, 29% of patients were diphtheria tetanus-infected, 10% were pertussis-infected, 44% were influenza vaccinated, 32% were pneumococcal and 24% were HIV-infected, and 31% were hepatitis B CKD patients. Influenza and pneumococcal diseases were positively linked with age. COPD, HIV and SOT patients were more likely than those with heart failure to receive influenza and pneumococcal disease vaccination.

The reason for non-vaccination concerned the efficacy, necessity and side effects of influenza vaccines and no awareness of the pneumococcal advice. Vaccination initiatives for vulnerable patients need to be monitored so we are committed to rigorous registration of vaccines and periodic vaccination communication.