Dr Octavio Campollo is an MD from Universidad La Salle (Mexico city, 1978), internal medicine residency (Mex), Master in Sciences (Gastroenterology) (Mex) and completed a PhD in Medicine at the Royal Free Hospital (University of London, 1989) with a Post- doc in Pharmacology and molecular sciences in Johns Hopkins University. He has worked in epidemiology of alcoholic liver disease, viral hepatitis, mathematical models and for the last 15 years in the epidemiology of tobacco and drug addictions and prevention in youths. He has been awarded a scholarship from DGAPA-UNAM (Mexico), the ORS award (UK), the CB Smith Grant from the University of Texas, the Misión Mexico-Canada on two occasions and the DISCA NIDA award in 2008. He was editor of the Journal Anuario de investigación en adicciones and teaches undergraduate and graduate courses of research methodology (medicine and social work), and Mathematics in Medicine and others (including online courses) at the University of Guadalajara. He participated as lecturer at the summer institute from CICAD-CAMH University of Toronto at the Center of addiction and Mental health (CAMH) in the summer of 2007 and has lectured at the University of California at San Diego. He was member of the National Hispanic Scientific Network on drug abuse (NHSN) since 2004 and was a DISCA-NIDA (National institute of drug abuse, USA) fellow in 2008. He founded and is head of the Center of studies on Alcohol and Addictions of the University of Guadalajara, Mexico and opened the Smoking cessation clinic at the Hospital Civil de Guadalajara. He has published over 34 articles in international journals including Medical, Gastroenterology, Hepatology, Addiction and Public Health journals and over 30 articles in Mexican journals. Current projects include public policy of legalization of marihuana,viral hepatitis and HIV in drug addicts and history of hepatology. viral hepatitis in drug adicts, epidemiology and treatment of tobacco use.