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Did you know?
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Excessive alcohol use costs the country approximately $235 billion every year.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
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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.