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Caring for someone you love who is sick or disabled is never easy. When the illness affects your loved one's state of mind, the demands placed on you can be especially hard.

Herpes meningoencephalitis is an infection of the brain and the tissue that covers it with the herpes simplex virus.

Monoclonal antibody therapy is a type of treatment for cancer that is given in medicines to attack certain parts of cancer cells. Learn more about how this treatment works.

There is no cure for age-related macular degeneration (AMD) at this time. But treatment can slow progression of the disease. And new treatments are in development. Here's what you should know.

Infectious mononucleosis causes swollen lymph glands, fever, sore throat, and chronic fatigue.

Common symptoms of a potential emotional, behavioral, or developmental problem include poor grades in school, withdrawal from friends and family, and insomnia.

Pain is a common side effect of cancer and cancer treatment. But sometimes people have pain even after cancer is gone and treatment is over. This can cause problems with daily life and make it harder to function or enjoy things.