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Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
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There are 60,000 miles of blood vessels in every adult human.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.