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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The average adult has about 21 square feet of skin.