There are a significant number of factors that influence whether parents choose or refuse to immunise their children. The primary reasons appear to be civic duty, financial incentive, understanding of the medical implications, and complacency. This article considers these factors in light of Australia's immunisation strategy, in particular the National Immunisation Program and the new No Jab No Play campaigns in various Australian jurisdictions. In assessing the effectiveness of these measures, the article concludes that some compulsory measures are required to maintain Australia's immunisation rates against transmissible disease.