MPs in Westminster Hall have debated the problems caused by Myalgic Encephalomyelitis on 2 February 2011.
ME (Myalgic Encephalomyelitis), also known as Chronic Fatigue Syndrome (CFS), causes debilitating tiredness.
About 150,000 people in the UK have ME/CFS, 15,000 of whom are children.
A recent study on children has found further evidence that it could be caused by a virus.
Scientists at the University of Dundee study found abnormalities in the white blood cells of children with ME/CFS, suggesting they had been fighting off infection.
The debate was led by the Liberal Democrat MP for Redcar Ian Swales.