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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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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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Vaccines prevent between 2.5 and 4 million deaths every year.
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The human body produces and destroys 15 million blood cells every second.
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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.