Pneumococcal pneumonia is the most common type of bacterial pneumonia, and its impact can be serious—it can disrupt your life for weeks and, when severe, may require hospitalization. Adults 19-49 with certain underlying medical conditions like lung disease, heart disease, diabetes, and those who smoke cigarettes are especially vulnerable. All adults aged 50 and older are also at increased risk for pneumococcal pneumonia. Learn more about your risk and how to help prevent this potentially serious