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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.