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Author Question: If Norwegian workers are more productive than Albanian workers, then trade between Norway and ... (Read 96 times) |
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There are approximately 3 million unintended pregnancies in the United States each year.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.