Myalgic Encephalomyelitis (ME) or Myalgic Encephalomyelitis/chronic fatigue syndrome (ME/CFS), is a complex chronic disease that presents with symptoms in multiple body systems. ME is a neurological disease according to the World Health Organisation. Susceptibility may be genetic, but the disease is triggered by infection in the majority of patients. ME may be severe: 75% of those affected are unable to work and 25% are homebound or bedridden. ME is a common chronic consequence of viruses, with 10-12% of those with serious infection going on to develop the disease. An estimated 15-30 million people live with the disease worldwide. -ME ACTION.