Fig 1.
Example of message for the Myths vs. Facts Correction.
Fig 2.
Example of message for the Visual Correction.
This message compared the potential problems caused by measles with the potential problems caused by the MMR vaccine. Common and usually mild symptoms that can be treated at home are represented in green, moderate complications that need medical attention but may not include hospitalisation are portrayed in yellow, and serious complications that need urgent medical attention and could include hospitalisation are marked in red.
Fig 3.
Example of message for the Fear Correction.
This message was accompanied by a picture of a child with swelling at the side of the face under the ears.
Fig 4.
Overview of the different phases of the study.
Table 1.
Descriptive statistics (means and standard deviations) for the outcomes at Time 1 and Time 2.
Fig 5.
Mean scores of the 3 key outcomes evaluated: Vaccines Cause Autism (A), Vaccines Side Effects (B), and Vaccine Hesitancy (C) by condition and time (after a week). Outcomes means at Time 1 are represented by blue bars, while outcome means at Time 2 by green bars. Error Bars: 95% CI.
Fig 6.
Change scores for the 3 key outcomes evaluated: Vaccine Cause Autism Change Score (A), Vaccines Side Effects Change Score (B), and Vaccine Hesitancy Change Score (C) across conditions. Error Bars: 95% CI.