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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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Vaccines prevent between 2.5 and 4 million deaths every year.