U.S. Vietnamese parents' trusted sources of information and preferences for intervention messaging about HPV vaccination: A mixed methods study

•US Vietnamese parents' views on adolescent HPV vaccination assessed via a mixed-methods study.•Parents showed high trust in providers, government agencies, cancer organizations.•Effective messages emphasized safety, expert endorsement, cancer prevention.•Desire for information in Vietnamese addressing cultural concerns.•Incongruent findings on trust in information disseminated via social media.