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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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