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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.