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Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.