Attitudes to vaccine co-administration in adults: A scoping review of qualitative evidence.

Providing multiple vaccinations to adults at a single appointment, known as co-administration, could help increase vaccine coverage by making the process more convenient for the public. Despite vaccine co-administration policies, there are many missed opportunities to offer multiple vaccines. A qualitative understanding of the public attitude to co-administration may allow the development of interventions to increase implementation of co-administration policies. We undertook a scoping review following the Joanna Briggs Institute framework to collate the available qualitative literature to identify barriers, and facilitators to vaccine co-administration as well as potential research gaps. We created and used an iterative search strategy to retrieve articles published between 1/10/2010 and 11/12/2024 in three scientific databases. None of the articles retrieved fulfilled the inclusion criteria. There were nine articlesthat used quantitative surveys to measure attitudes, barriers and facilitators. Qualitative studies to understand barriers and facilitators to vaccine co-administration are needed to inform future policy implementation.