A 12-week regimen of Harvoni is 90 percent effective in curing an infection with hepatitis C, doctors say. It also costs about $95,000. Baltimore Sun/TNS via Getty Images hide caption

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Surgeons at Methodist University Hospital in Memphis prepare to transplant a liver in 2010. Karen Pulfer Focht/The Commercial Appeal/Landov hide caption

toggle caption Karen Pulfer Focht/The Commercial Appeal/Landov