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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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Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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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.