Asthma cases in Americans are about 75% higher today than they were in 1980.
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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The horizontal fraction bar was introduced by the Arabs.