Dr Janni Leung is an epidemiologist and is a Global Substance Use and Mental Health Research Fellow at The University of Queensland in Australia. They have qualifications and training in public health, sociology, and psychology. In addition, they have strong research and teaching experience in epidemiology and biostatistics. They have published over 100 scientific papers and conference presentations in the substance use epidemiology field. Janni is committed to conducting high-quality rigorous research to generate empirical scientific evidence to inform decisions to prevent substance use-related harms in the population.