Actuality. Modern medicine shows a sharp growth of patients with comorbid and concurrent chronic diseases, involving not only the mature and older persons but also the young people. Combined diseases of the circulatory and respiratory systems are the main cause of death, disability of the population and major labor losses. The aim of this work was to study the vaccine prophylaxis effectiveness for chronic obstructive pulmonary disease (COPD) patients having the different Charlson comorbidity index. Material and methods: This study covered 174 patients with COPD and IHD. All patients were subject to the complex clinical research, including the medical assessment, patient complaints, medical history, physical and instrumental examinations and pathology tests Assessment of respiratory function and general Body plethysmography were performed Degree of dyspnea was assessed using a scale provided by Medical Research Center. Number of COPD exacerbations, hospitalizations and pneumonia development cases were analyzed. Modified Charlson comorbidity index was calculated for all patients Results and conclusions: Among the patients with comorbidity the severe manifestations of chronic obstructive pulmonary disease correspond to the more pronounced functional classes of angina pectoris. With the comorbidity index growth the number of exacerbations, hospitalizations and pneumonia cases were increasing. Vaccine prophylaxis is the most effective for the patients having the lower comorbidity indices and shows a tendency to stabilize these indicators for the patients having the moderate & high levels of comorbidity, and therefore, are to be recommended for all COPD and CVD patients. Changes in clinical and functional parameters of respiratory function for COPD patients are statistical-significantly different for the patients having the low and high levels of comorbidity.