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Did you know?
Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.