Campaign Governance and Playfulness: Unraveling Chinese HPV Immunization Promotion Efforts on Douyin

(1) Background: Playful immunization promotion helps to approach persuasive efforts and raise vaccine acceptance. However, playful promotion in the field of HPV immunization has not been explored. (2) Methods: To address this gap, we analyzed data gleaned from 73 short videos posted by state media and from semi-structured interviews with 37 Chinese stakeholders using thematic analysis. (3) Results: The analysis revealed that state media promoted HPV immunization using celebrity endorsement, anthropomorphism techniques and entertainment performance strategies. Additionally, state media engaged in circle mobilization and livestreamed on Douyin to reach wider audiences. Although playful strategies increased the popularity of HPV vaccine promotion, insufficient multi-stakeholder partnerships and homogeneous message delivery decreased the efficiency of HPV immunization promotion campaigns. (4) Conclusions: The strengthening of multi-stakeholder partnerships and the optimization of the public service provision of HPV vaccination are expected. Our research will not only deepen the global audience's understanding of Chinese immunization promotion campaigns, but also offer insights for implementing future global health promotion.