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There are 60,000 miles of blood vessels in every adult human.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.
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The longest a person has survived after a heart transplant is 24 years.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.