Assessing WHO's influence: A randomized conjoint experiment on vaccine endorsements in diversified global health systems.

ABSTRACT: During a novel pandemic, significant uncertainty drives individuals to seek expert guidance on preventive measures such as vaccination. Yet, it remains poorly understood how people process information in a highly complex landscape of global health governance where multiple experts may offer competing, repetitive, or contradictory advice. This study investigates the influence of World Health Organization (WHO)'s endorsements of vaccines amidst this environment. In fall 2020, we conducted a randomized conjoint experiment in Canada (832 respondents, 8,320 profiles evaluated), Japan (1,474, 14,740), and the United States (1,001, 10010), focusing on both whether and when people choose to vaccinate against COVID-19. Our experiment randomly varied exposure to vaccine endorsement information from

SUBMITTER: Matsumura N 

PROVIDER: S-EPMC12637889 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature