Development and Validation of a Health Belief Model-Based Health Education Toolkit in Measles Vaccination for Parents in Malaysia.

Measles remains a global health threat, and rising vaccine hesitancy in Malaysia underscores the need for locally tailored communication strategies to strengthen public trust and vaccination. This current research developed and validated the Parental Health Education (PaHE)-Measles toolkit, grounded in the Health Belief Model, to support parental confidence and the uptake of measles, mumps, and rubella (MMR) vaccination in Malaysia through a four-stage process: information gathering, preliminary adaptation design, preliminary adaptation testing, and adaptation refinement. Five multidisciplinary experts validated its content both in Malay and English, and 10 health care providers confirmed overall quality. The acceptability was assessed among 30 end-users. The PaHE-Measles achieved a Content Validity Index (CVI) score of 1.0 from expert reviewers, whereas health care providers rated its understandability and actionability more than 80%. End-users reported an average score of over 9.0. In conclusion, PaHE-Measles is a valid and ready toolkit for educating parents, countering misinformation, and strengthening vaccine confidence.