Chronic fatigue syndrome (CFS) is a poorly understood condition that develops mainly in adults ages 20 to 40. Its main symptoms include:
In the past it was believed that chronic fatigue syndrome was caused by long-term infection with the Epstein-Barr virus (EBV). But research has shown that chronic fatigue syndrome and EBV infection are two different illnesses and that EBV does not cause chronic fatigue syndrome.
For more information, see the topic Chronic Fatigue Syndrome.
|Primary Medical Reviewer||E. Gregory Thompson, MD - Internal Medicine|
|Specialist Medical Reviewer||W. David Colby IV, MSc, MD, FRCPC - Infectious Disease|
|Last Revised||July 28, 2011|