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There are 60,000 miles of blood vessels in every adult human.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.