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Vaccines prevent between 2.5 and 4 million deaths every year.
The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
The longest a person has survived after a heart transplant is 24 years.
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