An upswing in opioid dependency and in the rate of people reporting injection drug use in four central Appalachian states has occurred in tandem with a rising hepatitis C virus (HCV) incidence, MedPage Today reports. Centers for Disease Control and Prevention (CDC) officials partnered with the health departments of Kentucky, Tennessee, Virginia and West Virginia to analyze hep C surveillance data and information about drug treatment admissions in these states between 2006 and 2012. They reported their findings in the May 8 issue of Morbidity and Mortality Weekly Report.