A discrete choice experiment for evidence-based decision-making to Explore Willingness to pay for Covid-19 vaccination

Abstract

Abstract Covid-19 pandemic has caused a massive challenge for global healthcare systems. The longtime solution to prevent the spread of virus is to develop an effective vaccine. To com (WTP). The objective of the present study was to explore the WTP of people aged over 18 for Covid-19 vaccination through a discrete choice experiment (DCE) for evidence-based decision-making. A cross-sectional survey was performed during two mid-weeks in May 2020 in six southeastern provinces in Vietnam. A self-design three-part questionnaire was used to investigate the community. A DCE was designed with twelve vaccine profiles, each one involved four attributes, protection efficacy, duration, side effects and out-of-pocket cost. A binary logistic regression model was applied to predict the probability of choosing a given vaccine. Protection duration posed the highest effect on vaccine choice (prevalence weight 1.2109). The marginal WTP for 10-year protection is US$531.77 (95% CI: 284.31–1485.58). If the vaccine improved to 95% protection for 10 years and had no side effects, the WTP increased to $1466.79. When the self-paid cost increased from US$12.5 to 200, the probability decrease dramatically decreased approximately 21%. This study resulted a high value that southern Vietnamese residents were willing to pay for a vaccine against Covid-19. These findings support decision makers in the implementation of vaccine program in the future.