Bronchiolitis is an inflammation of the small airways (bronchioles) and most often affects infants less than 2 years of age. Bronchitis causes inflammation of the bronchi (and bronchioles to a ...

It travels down the trachea – or windpipe – into one of two bronchi and into bronchioles before entering one of millions of alveoli, where gaseous exchange takes place. When we breathe out ...

Dear Doctors: I was recently sick with what I thought was the flu. I had a fever, sore throat and a terrible cough. I have asthma, so my husband insisted that I see our family doctor. She said ...