In-depth

Allergies

Anaphylaxis

Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.

Ascariasis

Aspergillosis

Asthma

Asthma attack

Asthma attack: Find out what the symptoms are and how to treat an asthma attack.

Atrioventricular canal defect

Bronchitis

Bronchitis often develops after a cold. Learn how to prevent this potentially serious lung infection.

Cystic fibrosis

Dilated cardiomyopathy

Dust mite allergy

Dust mite allergy, an immune system reaction to inhaled dust mite "debris," causes hay fever symptoms and may cause allergy-induced asthma.

Food allergy

Food allergy symptoms can make you miserable. Unfortunately, there's no cure — but there are steps you can take to keep your symptoms in check.

Heart failure

Lung cancer

Milk allergy

Peanut allergy

Pectus excavatum

Penicillin allergy

Pulmonary edema

Pulmonary embolism

Respiratory syncytial virus (RSV)

Shellfish allergy

April 15, 2014