Chronic fatigue syndrome 'could be triggered by overactive immune system'

Research suggests body's response to infection may be responsible for onset of CFS

An overactive immune response appears to be a trigger for persistent fatigue, say researchers in a study that could shed light on the causes of chronic fatigue syndrome.

Chronic fatigue syndrome (CFS) is a debilitating long-term condition in which individuals experience exhaustion that is not helped by rest, as well as pain, mental fogginess and trouble with memory and sleep. It is also known as myalgic encephalomyelitis (ME).