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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.