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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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Excessive alcohol use costs the country approximately $235 billion every year.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.