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Did you know?
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Cyanide works by making the human body unable to use oxygen.