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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Everyone has one nostril that is larger than the other.
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There are 60,000 miles of blood vessels in every adult human.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.