Central to the SARS-CoV-2 pandemic strategy, COVID-19 vaccination depends on the population’s uptake decisions. Because at least 60% of the population needs to be vaccinated, but fewer, for example, in Germany are expected to do so, it is important to know how to convince those who are undecided or skeptical. According to the health care standard of enabling citizens to make informed decisions based on balanced information (boosting) – instead of persuasion or seduction (nudging) – a comparison of benefits and harms of having or not having the vaccination would be required to inform these groups. With the help of a representative survey, we investigated the contribution of fact boxes, an established intervention format for informed intentions. Study 1 shows the development of knowledge and evaluation of COVID-19 vaccinations by German citizens between Nov 2020 and Feb 2021. Study 2 reveals objective information needs and subjective information requirements of those laypeople at the end of Nov. Study 3 shows that the fact box format is effective for risk communication about COVID-19. Based on these insights, a fact box on the efficacy and safety of mRNA-vaccines was implemented with the help of a national health authority. Study 4 shows that fact boxes increase vaccination knowledge and positive evaluations of the benefit-harm ratio of vaccination in skeptics and undecideds. Our results demonstrate that simple fact boxes can be an effective boost of informed decision making among undecided and skeptical people, and that informed decisions can lead to more positive vaccination evaluations of the public.
How skeptics could be convinced (not persuaded) to get vaccinated against COVID-19