Comparing Two Pneumococcal Vaccines in Adults With Chronic Obstructive Pulmonary Disease

Individuals who are infected with the Streptococcus pneumoniae bacteria may develop pneumococcal disease, a serious disease that kills more people in the United States than all other vaccine-preventable diseases combined. Individuals with COPD, characterized by breathing difficulties due to damaged and obstructed lung airways, may have an increased risk of developing serious complications from pneumococcal disease, including pneumonia and meningitis. Currently, there are two types of pneumococcal vaccines available. The pneumococcal capsular polysaccharide (CPS) vaccine, known as Pneumovax, is typically given to adults 65 years of age or older and to any individuals with a serious health condition, including heart disease, lung disease, and diabetes. The diphtheria protein-conjugated vaccine (PCV7), known as Prevnar, is typically given to infants; however, adults who receive this vaccine may also have a favorable response. The purpose of this study is to compare the immune response to the Pneumovax and Prevnar vaccines in adults with COPD. This study will enroll adults with mild to moderate COPD. Participants will be randomly assigned to receive either the Pneumovax or Prevnar vaccine. This will involve one or two injections. Blood collection will occur during study visits at Months 1, 12, and 24. Study researchers will contact participants by telephone at Months 6 and 18 to document any pneumococcal infections and any additional pneumococcal vaccinations.