Heart disease is the leading cause of death in the U.S. Learn about the different types of heart diseases, and what you can do to try to prevent them.| medlineplus.gov
An allergy is a reaction by your immune system. Substances that cause reactions include pollen and food. Find the full list of allergies and symptoms.| medlineplus.gov
Spirometry is the most common type of pulmonary function or breathing test that measures how much air you can breathe in and out of your lungs.| www.lung.org
It's normal to be anxious at times. It may be time to get help if anxiety attack is severe or when anxiety doesn't stop. Learn about anxiety disorders.| medlineplus.gov