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The human body produces and destroys 15 million blood cells every second.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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There are approximately 3 million unintended pregnancies in the United States each year.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.