Table 2.

MI4MI intervention components

Intervention component	Description
Online video module	Introduces the MI4MI communication strategy and its rationale
One 60 min in-person interactive clinician training session	(1) a brief didactic session on vaccine hesitancy, how the MI4MI strategy addresses vaccine hesitancy, and practice data on vaccination coverage and vaccine hesitancy prevalence (2) baseline assessments of clinician skills using the presumptive format and MI (3) modelling the MI4MI intervention followed by clinician rehearsal through role-playing and coaching by the study team
Reference sheets	Provides brief and accessible summaries of the communication behaviours that comprise MI4MI and example scripted language for key steps in the MI4MI strategy
60 min in-person refresher trainings at 3 months after the start of the intervention	Includes a question and answer session regarding barriers to implementing the MI4MI intervention followed by role-playing and coaching. Refresher training will include review of audiotaped encounters to provide feedback for how to improve incorporation of MI4MI into the vaccine discussion.
Practice study champion	Staff liaison who routinely solicits feedback from intervention clinicians regarding the MI4MI intervention and communicates with the study team at regular intervals to coordinate implementation data collection and assist with implementation issues

MI, motivational interviewing; MI4MI, Motivational Interviewing for Maternal Immunisation.