Epstein-Barr virus may increase risk of multiple sclerosis

Evidence is mounting that infection with the Epstein-Barr virus (EBV), which can cause mononucleosis, may also increase the risk of developing multiple sclerosis later in life.

Study: Treatment for cancer has preventive benefit

Using tamoxifen in hopes of preventing breast cancer would benefit more than 2.4 million women, the vast majority middle-aged and white, despite the drug's serious side effects.