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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.