Walking pneumonia cases in the United States, especially among children, are on the rise and have been since early spring, according to the Centers for Disease Control and Prevention. Infections ...

Over 200 viruses can cause colds, but six are the most common. These include rhinovirus, coronavirus (common cold version), and enterovirus.

Chronic obstructive pulmonary disease (COPD) is marked by shortness of breath, wheezing, and coughing. Learn about celebrities who've been affected by it.