At baseline
At baseline (i.e. before introducing participants to the campaign video) a total of 382 participants indicated to be vaccine hesitant (31.2% of in total 1226 participants). The highest vaccine hesitancy was in those recruited through FB (37.3%), compared to the Indian radio station (22.2%) and the Dutch newspaper (16.9%). After showing the campaign video, vaccine hesitancy decreased across the formats but remained highest in participants from FB (36.5%), followed by the Indian radio station (17.8%) and the Dutch newspaper (13.2%) (Supplementary Table 