Professor Mark Ferson is a public health physician and paediatrician with additional qualifications in epidemiology and art history. In 1990, he became the first NSW public health unit director and is currently the Director and Public Health Officer, Public Health Unit, South Eastern Sydney Local Health District. Within the NSW public health network, Mark is the Chair of the Infectious Diseases Network which is tasked with promoting high standards, open communication and consistency of practice across the state. He has an honorary appointment as public health medicine subspecialty editor for the Internal Medicine Journal. Mark holds professorial appointments at the University of New South Wales School of Public Health & Community Medicine and the Notre Dame University School of Medicine Sydney. His research interests are in the epidemiology and control of infectious diseases, with a particular focus on childcare settings, childhood vaccination, gastroenteritis viruses and the exanthemata, and on public health law and history. He has been author or co-author on over 130 scientific papers on the field of public health.