What is the infectious agent that causes chronic fatigue syndrome?
The cause of chronic fatigue syndrome is being studied but has not yet been identified. Some scientists believe that a virus, stress, or other traumatic condition might trigger the immune system and cause fatigue. Others believe that the disorder is related to the hormonal (endocrine) system or to psychological conditions. Or, the cause might be an as-yet-unidentified disease agent. How do people get chronic fatigue syndrome? No one knows. What are the signs and symptoms of chronic fatigue syndrome? The main symptom is profound tiredness. People with chronic fatigue syndrome often become exhausted from only light physical activity and must function at a much lower level of activity than they did when healthy. Other symptoms reported by people with chronic fatigue syndrome are: weakness, muscle aches and pains, excessive sleep, fever, sore throat, tender lymph glands, forgetfulness, confusion, difficulty concentrating, and depression. The recovery time varies widely. Some people eventua
