People with a weakened immune system often have worse outcomes when they develop serious infections. HIV is one of the most common causes of immunodeficiency in the world and affects more than one million people in the United States. People living ...

Stroke occurs when an artery is blocked or ruptures interrupting blood flow to the brain causing brain cells to die. Certain health and lifestyle issues, called risk factors, increase your chance of having a stroke that could lead to serious ...

A risk factor is anything that may increase your chance of having a disease. When it comes to breast cancer, knowing your risks can help you make the healthiest choices possible and detect problems early. Breast cancer screening mammography ...

Radiation therapy for breast cancer uses high-energy X-rays to kill cancer cells. Rapidly growing cells, such as cancer cells, are more susceptible to the effects of radiation therapy than are normal cells. The X-rays are painless and invisible. You ...