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There are 60,000 miles of blood vessels in every adult human.
Approximately 25% of all reported medication errors result from some kind of name confusion.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
On average, the stomach produces 2 L of hydrochloric acid per day.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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