<unk>  bronchitis is the ninth most common illness among outpatient visits in the U.S. It's prevalence depends on season of the year, vaccination status and outbreaks during that particular year. It is common among young children and the elderly.
Acute bronchitis epidemiology and demographics
Chronic bronchitis epidemiology and demographics
Bacterial pneumonia epidemiology and demographics
Bronchitis epidemiology and demographics
Asthma epidemiology and demographics
Aspiration pneumonia epidemiology and demographics
Bronchiectasis epidemiology and demographics
Bronchiolitis epidemiology and demographics