Thorpe 2021.

Study characteristics
Methods	Study design: randomised controlled trial Type of publication: preprint Setting and dates: veterans and general population, March 8, 2021 to March 23, 2021. Country: USA Language: English
Interventions	Information messaging: Message 1: a fact‐box styled message comparing the risks of getting COVID‐19 compared to the vaccine Message 2:  a timeline styled message describing the development process of the COVID‐19 mRNA vaccines Control group: no message
Population	Population: veterans and general US population Age: NR Gender: NR Ethnicity: NR Number of participants (assessed): 1075
Outcomes	Vaccine intention measured on a 5‐point scale
Notes	COI: NR Funding: NR