Bronchitis affects the bronchial tubes that carry air to your lungs. Pneumonia affects the air sacs, called alveoli, where oxygen passes into your blood. Pneumonia causes these air sacs in the ...
More than 11 million people in the United States are living with chronic obstructive pulmonary disease (COPD), including more than 3 million people with emphysema, a type of COPD. This chronic ...