The purpose of this Learning Community is to provide information related to the epidemiology of alcohol and other drug use. In the future we hope to build an online community of persons interested in learning about the scope of substance abuse and sharing knowledge about issues such as substance abuse prevalence, incidence, risk and protective factors, social indicators of use and abuse, and a host of other epidemiologic concepts. The ultimate goal of the site is for users to access and provide information related to describing the drug abuse problem in their communities, in Missouri, and across our nation.