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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.