Statistics

• According to the National Heart Blood and Lung Institute (NHBLI), nearly 12 million adults in the United States know they have chronic obstructive pulmonary disease. The American College of Allergy, Asthma & Immunology estimates that nearly 22 million Americans have been diagnosed with asthma.
  
  

Definition of COPD

• COPD is a disease that interferes with normal breathing. The term covers two main illnesses: emphysema and chronic bronchitis.
  
  

Smoking and COPD

• Most people with COPD have a history of smoking.
  
  

Age of Onset for COPD and Asthma

• Middle-aged and older people tend to develop COPD, developing slowly over time. According to the American College of Allergy, Asthma & Immunology, asthma is more common in children than adults.
  
  

Cause of Asthma

• Scientists have not discovered the exact cause of asthma. Many believe it's a combination of genetics and exposure to certain allergens or viruses.
  
  

Asthma and Inflammation

• Asthma results in inflammation of the lungs. Due to the inflammation, the airways are sensitive, reacting strongly to some substances.