Immune system

Barriers
Mucosal immune system

Chronic fatigue syndrome
There is evidence of immune dysregulation in chronic fatigue syndrome.

Reduced natural killer cell function.

Elevated regulatory T cells

Learn more

 * Crash Course - The Immune System Part 1 (Adaptive immune system)
 * Crash Course - The Immune System Part 2 (humoral immunity & B cells)
 * Crash Course - The Immune System Part 3 (cell-mediated immunity & T cells)