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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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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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Vaccines prevent between 2.5 and 4 million deaths every year.