Asthma is a common disorder in which chronic inflammation of the bronchial tubes (bronchi) makes them swell, narrowing the airways. Signs and symptoms include shortness of breath, chest tightness, cough and wheezing.
Slideshow: 10 Worst Cities for Asthma, 2011
While there are no asthma-free cities, some are more challenging than others for people living with asthma. View this slideshow to see the 10 worst cites for asthma in 2011, according to the Asthma and Allergy Foundation of America.
With this quiz, your asthma IQ depends on your understanding of the asthma causes, symptoms, and treatments that affect millions of American men, women, and children.
Watch this slideshow on asthma and learn about this chronic inflammation disorder of the bronchiole tubes (airways) resulting in breathing difficulty. Find information on causes/triggers, symptoms, prevention and treatment of the disease.