Evaluation of Indigenous status completeness in vaccine preventable disease notification data in the NNDSS

National level Indigenous status completeness is high for most VPDs but low for others, particularly for high incidence diseases predominantly notified by laboratories. Completeness is uniformly high for all VPDs in the Northern Territory and Western Australia; however, this is due to the resource-intensive public health follow-up of all notifications and manual cross-checking of other databases when Indigenous status is missing. To more efficiently optimise Indigenous status completeness in the NNDSS across all jurisdictions, a mix of additional strategies is needed to ensure accurate identification and recording in primary care, hospital, laboratory and public health settings, and effective transfer between them.