On this edition of Century of Lies: Prevention and Harm Reduction. The European Union Drugs Agency – EUDA for short – recently held a fascinating webinar entitled “Novel strategies to promote health and social responses to drug use — e-prevention and e-harm reduction.” E-prevention and e-harm reduction refer to digitally delivered interventions designed to prevent, or reduce negative consequences associated with, substance use. We hear some of the presentations by Doctor Fernando Caudevilla, a family medicine physician in Spain who also works as a harm reduction advocate under the pseudonym Doctor X, and by Damian Sobczyk with Mestosław in Poland.