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Did you know?
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The human body produces and destroys 15 million blood cells every second.