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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.