Table 1.

Sub-classification of vaccine hesitancy: definitions

Parental Position	Definition
Unquestioning acceptor	Vaccinate – no specific questions
Cautious acceptor	Vaccinate despite minor concerns
Hesitant (Group 1)	Vaccinate but have significant concerns. Focused on vaccine risk. Trust in healthcare provider key High levels of vaccine knowledge
Late or selective vaccinator (Group 2)	Significant concerns about vaccination result in this group choosing to delay or select only some recommended vaccines Highest level of vaccine knowledge
Refuser (Group 3)	Refuse all vaccines. Strong and specific religious, cultural or philosophical beliefs. Lower levels of vaccine knowledge

Adapted with permission from Leask et al.^23,24