How the Development, Features and Roll-Out of a SARS-COV-2 Vaccine Shape Public Acceptance: A Conjoint Experiment in a Large Representative Sample of Danes
While effective vaccines against the SARS-COV-2 virus have been developed and countries around the world have invested heavily to secure vaccine rollout, a fundamental challenge remains. How do policy-makers around the world ensure high vaccine uptake? What is lacking is a comprehensive assessment that captures a total spectrum of features related to the development of a vaccine, the vaccine's characteristics as well as the implementation of the vaccination program. To provide such an assessment, we designed a conjoint experiment embedded in large-scale surveys based on a random sample from the central database of Danish social security numbers (N = 3,099), providing a sample that is representative for the adult Danish population. In the conjoint experiment, we vary features relating to three dimensions: 1) the stage of vaccine development, 2) the specific characteristics of the vaccine, and 3) the implementation of the vaccination strategy. We show that the features relating to characteristics of the specific vaccine have the strongest impact on vaccine acceptance. The features relating to vaccine development were the second most powerful, while the features relating to the implementation of the vaccination strategy were the least.