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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.
Approximately 25% of all reported medication errors result from some kind of name confusion.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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