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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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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.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.