Despite strong recommendations, immunization rates for influenza and pneumococci are low. We aimed to analyse the vaccination status and its determinants in patients with chronic lung diseases. Methods: Information about actual influenza (IV) and pneumococcal (PV) vaccination status was obtained by a standardised questionnaire from 2491 patients presenting to a specialised centre of respiratory medicine in Rotenburg/Wuemme (Germany). Bivariate and multivariate analyses were used to identify potential determinants of IV and PV. Results: Of 2131 patients with asthma and/or COPD, included into detailed analyses (52.0% male, mean age 56.6 years), 46.5% had received an IV and 14.6% a PV. Main reason for not being vaccinated was the lack of information, reaching 87.6% for PV (53.5% for IV); 37.0% saw no reason for an IV (PV 21.3%). Vaccination rates differed depending on the patients' age and education level. Conclusion: The results indicate a marked information deficit on immunization which is explicitly higher for PV. Target-group-specific strategies should increase the knowledge on vaccinations in order to avoid the development or aggravation of acute and chronic lung diseases.