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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.