In-depth

Anaphylaxis

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

Asthma

Asthma occurs when the main air passages of the lungs become inflamed, causing wheezing and difficulty breathing. Knowing warning signs can help you manage this chronic condition.

Membranous nephropathy

Your kidney's filtering system is damaged and valuable proteins leak from the body.

Feb. 22, 2012