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Vaccines prevent between 2.5 and 4 million deaths every year.
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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 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.