At the level of communicators
In a general comparison between the two communicators (i.e. Indian and Dutch communicator) no statistically significant difference was observed with respect to the improvement of vaccine willingness in the vaccine hesitant group (18.4% vs. 16.0%, respectively, When comparing cultural tailoring of the communicator (i.e. matching the background of the physician with the background of the participant) with non-tailoring of the communicators (unmatched backgrounds of the physician and the participant) we found no difference of the effect of the campaign video (13.9% for the tailored communicator vs. 20.7% for the non-tailored communicator, respectively, These findings suggest that the participants did not show any preference for cultural tailoring of health care providers, as also was apparent from the results of our survey questions on the preference of having a culturally tailored healthcare provider (answers were tending towards ‘strongly disagree’ and ‘disagree’, Supplementary Table 