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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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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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There are 20 feet of blood vessels in each square inch of human skin.
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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.