 This study found that among Malaysian adults aged greater than or equal to 18 years who have completed a primary vaccination series, 43% were definitely willing to receive a COVID-19 vaccine booster, while 38% were somewhat willing and only 5.7% were definitely unwilling. Demographically younger participants, those of higher income, Chinese ethnicity, and those from the central region reported significantly higher odds of a definite willingness to receive the COVID-19 vaccine booster compared to the reference group. Having no side effects with past COVID-19 vaccination, lower pandemic fatigue score, and higher preventive practices score were also associated with higher odds of definite willingness. Attitudes toward COVID-19 booster vaccine, such as having fewer concerns about side effects and uncertain long-term safety, also influenced the likelihood of a definite willingness to receive the booster. This article was authored by Li Ping Wong, Harida Alias, Yang Li-sire, and others. We are article.tv, links in the description below.