Pneumonia is a common illness in all parts of the world. It is a major cause of death among all age groups. Mortality from pneumonia generally decreases with age until late adulthood. Elderly individuals, however, are at particular risk for pneumonia and associated mortality. More cases of pneumonia occur during the winter months than during other times of the year. Pneumonia occurs more commonly in males than females, and more often in African Americans than caucasians.  People who are hospitalized for any reason are also at high risk for pneumonia. Following urinary tract infections, pneumonia is the second most common cause of nosocomial infections, and its prevalence is 15-20% of the total number.
Pneumonia epidemiology and demographics
Bacterial pneumonia epidemiology and demographics
Community-acquired pneumonia epidemiology and demographics
Hospital-acquired pneumonia epidemiology and demographics
Aspiration pneumonia epidemiology and demographics
Tuberculosis epidemiology and demographics
Influenza epidemiology and demographics
Infectious disease epidemiology and demographics