The NSW Public Health Bulletin is published by CSIRO PUBLISHING on behalf of the Population Health Division of the NSW Department of Health. Its purpose is to enable the timely communication of information on public health issues and contribute to the development of a well-trained and informed public health workforce in NSW. Although the Bulletin core audience includes the public health workforce within NSW Health and throughout NSW, it also has readers in the other states and territories of Australia and overseas who have an interest in public health.