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T Cells

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Updated June 30, 2013

Definition:

A type of white blood cell that's critical to the immune response. T cells attack virus-infected, foreign or cancerous cells. T cells also can activate or deactivate immune cells.

Research suggests that people with chronic fatigue syndrome may have reduced T cell response to certain infectious agents, supporting the theory that many symptoms of the condition may be caused by a chronic immune response possibly triggered by an abnormal response to common infectious agents.

Learn more: Immune System Terminology for Chronic Fatigue Syndrome.

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