title: A contagious disease model for researching and intervening in heroin epidemics.
mesh_terms: D002641:Chicago; D003140:Communicable Disease Control; D004812:Epidemiologic Methods; D003932:Heroin; D006801:Humans; D008962:Models, Theoretical; D009021:Morphine Dependence / Q000453:epidemiology / Q000517:prevention & control*; D012106:Research; D012919:Social Behavior; D012931:Social Environment; D014505:Urban Population
chemical_list: D003932:Heroin