Dan Werb, PhD, is an Assistant Professor in the Division of Infectious Diseases and Global Public Health. He is an epidemiologist and policy analyst with expertise in addictions, policy measurement, implementation science, and the use of clinical and multi-site data to assess the impact of harm reduction interventions and policy on HIV and other outcomes (e.g., overdose) among people who use drugs. Dr. Werb is the Director of the Centre on Drug Policy Evaluation and has a particular interest in investigating and responding to injection drug use initiation.