This 11th annual immunisation coverage report shows data for the calendar year 2017 derived from the Australian Immunisation Register (AIR) and the National Human Papillomavirus (HPV) Vaccination Program Register. This is the first report to include data on HPV vaccine course completion in Aboriginal and Torres Strait Islander adolescents. 'Fully immunised' coverage at the 12-month assessment age increased in 2017 to reach 93.8% and at the 60-month assessment age to reach 94.5% in December 2017. 

This study represents the first attempt to systematically audit the accuracy of AIR data at the national level since 2001. Of the 905 records included in the final analysis, 86% were assessed as accurate (truly overdue) and 14% as inaccurate (i.e. the child appeared overdue despite being actually up to date for the relevant antigen). The error rate ranged from 3% in Victoria to 29% in New South Wales.