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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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There are 60,000 miles of blood vessels in every adult human.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.