Co-designing an intervention to improve the childhood catch-up vaccination process for migrant parents in Australia.

Background: Catch-up vaccination is a personalised process through which children with missing recommended vaccinations or incomplete vaccination records are brought up to date with the Australian vaccination schedule. Navigating childhood catch-up vaccination can be difficult for migrant parents with inadequate health system knowledge and competing priorities during settlement. This study aimed to understand the experiences of migrant parents with childhood catch-up vaccination and co-design an intervention to improve the process.

Methods: We recruited migrant parents who had attended the City of Melbourne Immunisation Service in Melbourne, Australia to participate in a qualitative co-design study between June and August 2022. Expression of interest emails were sent by the service, and we recruited eligible participants. In Phase One, we conducted group interviews with parents to understand their experiences and preferences for an intervention, these were analysed using inductive and framework analysis. In Phase Two, we designed prototype interventions based on parents' preferences and suggestions. In Phase Three, parents shared their feedback on each prototype.

Results: Fourteen migrant parents participated in the study. Most parents did not discover the need for catch-up vaccination until childcare or kindergarten enrolment. The lack of information received about vaccination requirements and difficulty navigating the health system made the process challenging and time-consuming. Based on these Phase One themes, we designed a printout, mobile application, and website prototype. All three were well-received in Phase Three. Overall, parents' top three considerations for any intervention were 1) digital and online accessibility, 2) inclusion of step-by-step processes outlining catch-up vaccination; and 3) inclusion of a checklist.

Conclusions: Migrant parents lack information about childhood catch-up vaccination in Australia. A relatively simple intervention could help parents more easily navigate the process, thereby saving time and stress. The next steps are to seek funding to pilot such an intervention to assess practicality and usefulness.