Index:   Untitled C# - CE     Untitled CF - CN     Untitled COA - COZ     Untitled CP- CZ
    Chronic Fatigue Immune Dysfunction Syndrome [CFIDS]); Chronic Fatigue Syndrome (CFS), : an illness characterized by fatigue, neurological problems, joint and muscle pain, and impairment of the ability to function normally for 6 months or longer. CFS is associated with impaired natural killer cell activity. The cause of CFS is unknown, but the condition may be associated with a virus (e.g., Epstein-Barr virus).

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