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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 average office desk has 400 times more bacteria on it than a toilet.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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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.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.