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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Everyone has one nostril that is larger than the other.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.