IgA nephropathy, also called Berger’s disease, is a kidney disorder that causes inflammation of the glomeruli, the individual filtering units of the kidney that

Infectious mononucleosis (called "mono" for short) is caused by the Epstein-Barr virus (EBV), a virus that affects nearly everybody at some point. The disease

Infertility is usually defined as the inability to become pregnant after one year of vaginal intercourse without birth control. Without contraception, frequent intercourse results

The flu is a respiratory (i.e., nose, throat, and lung) infection that can be caused by a variety of influenza viruses. Many people use

In North America, there are very few types of insects that carry venom or poison, and none whose venom is dangerous. However, it is

Insomnia can refer to difficulty getting to sleep, difficulty staying asleep, waking up early without being able to return to sleep, or a combination

The blood that circulates throughout the body performs a number of critical functions. It delivers oxygen, removes carbon dioxide, and carries life-sustaining nutrients. By

Irritable bowel syndrome (IBS) is a common disorder of the intestine, causing abdominal pain with constipation, diarrhea, or alternating periods of both. IBS is