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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.