Effect of Information about COVID-19 Vaccine Effectiveness and Side Effects on Behavioural Intentions: Two Online Experiments
Top Cited Papers
Open Access
- 13 April 2021
- Vol. 9 (4), 379
- https://doi.org/10.3390/vaccines9040379
Abstract
The success of mass COVID-19 vaccination campaigns rests on widespread uptake. However, although vaccinations provide good protection, they do not offer full immunity and while they likely reduce transmission of the virus to others, the extent of this remains uncertain. This produces a dilemma for communicators who wish to be transparent about benefits and harms and encourage continued caution in vaccinated individuals but not undermine confidence in an important public health measure. In two large pre-registered experimental studies on quota-sampled UK public participants we investigate the effects of providing transparent communication—including uncertainty—about vaccination effectiveness on decision-making. In Study 1 (n = 2097) we report that detailed information about COVID-19 vaccines, including results of clinical trials, does not have a significant impact on beliefs about the efficacy of such vaccines, concerns over side effects, or intentions to receive a vaccine. Study 2 (n = 2217) addressed concerns that highlighting the need to maintain protective behaviours (e.g., social distancing) post-vaccination may lower perceptions of vaccine efficacy and willingness to receive a vaccine. We do not find evidence of this: transparent messages did not significantly reduce perceptions of vaccine efficacy, and in some cases increased perceptions of efficacy. We again report no main effect of messages on intentions to receive a vaccine. The results of both studies suggest that transparently informing people of the limitations of vaccinations does not reduce intentions to be vaccinated but neither does it increase intentions to engage in protective behaviours post-vaccination.Keywords
This publication has 82 references indexed in Scilit:
- Measuring Emotional Response: Comparing Alternative Approaches to MeasurementPolitical Science Research and Methods, 2015
- Vaccine hesitancy: Definition, scope and determinantsVaccine, 2015
- Does correcting myths about the flu vaccine work? An experimental evaluation of the effects of corrective informationVaccine, 2015
- What Are the Odds? A Practical Guide to Computing and Reporting Bayes FactorsThe Journal of Problem Solving, 2014
- The Health Belief Model as an Explanatory Framework in Communication Research: Exploring Parallel, Serial, and Moderated MediationHealth Communication, 2014
- The Drug Facts Box: Improving the communication of prescription drug informationProceedings of the National Academy of Sciences of the United States of America, 2013
- A Meta-Analysis of the Effectiveness of Health Belief Model Variables in Predicting BehaviorHealth Communication, 2010
- Public Health Response to Influenza A(H1N1) as an Opportunity to Build Public TrustJAMA, 2010
- GPOWER: A general power analysis programBehavior Research Methods, Instruments & Computers, 1996
- Validation of a Decisional Conflict ScaleMedical Decision Making, 1995