Difficulty concentrating and short-term memory
noticeable decrease in physical activity.
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
How this information was developed to help you make better health decisions.