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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.