His research interests focus on infectious disease epidemiology, substance use, and the social, environmental, and structural determinants of health of vulnerable populations. He has published more than 125 scientific publications, including articles in JAMA, BMJ, and The Lancet. He works closely with the Rhode Island Department of Health on the state’s overdose epidemic efforts and directs www.PreventOverdoseRI.org, a CDC-funded statewide online surveillance system. He also chairs the Rhode Island Overdose Data Working Group and serves as an expert advisor to the Governor’s Overdose Prevention and Intervention Task Force.