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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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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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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.
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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.