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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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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.