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Did you know?
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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Your heart beats over 36 million times a year.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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There are more bacteria in your mouth than there are people in the world.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.