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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.