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Thyroid conditions may make getting pregnant impossible.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.