[Not Available].

Chronic fatigue syndrome, previously known as chronic mononucleosis or post-infectious faligue, is a poorly understood illness characterized by chronic debilitating fatigue, recurrent flu-like symptoms, and few clinical or laboratory abnormalities. While a significant incidence of psychiatric illness has been demonstrated among patients with the chronic fatigue syndrome, there is also evidence of subtle immune system abnormalities, leading some researchers to postulate a multi-fatorial psycho-immune cause.