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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.