Professor of Behavioural Medicine and Epidemiology at the Faculty of Medicine, Universiti Malaya, with over two decades of experience in multidisciplinary research, postgraduate education and international collaboration. My research has focused on understanding health behaviours, risk perceptions and preventive practices across diverse populations, particularly in infectious disease prevention and public health. My research contributions span HIV/AIDS, HPV vaccination, influenza A(H1N1), COVID-19, dengue, Zika, hepatitis E, antibiotic use and antimicrobial resistance, as well as noncommunicable diseases, health promotion and digital health. I have pioneered behavioural studies on HPV vaccination in Malaysia and China, led longitudinal investigations of public responses to emerging infectious diseases, and contributed to multinational studies on vaccine acceptance and pandemic preparedness. My research also encompasses vulnerable populations, health inequalities, healthcare utilisation and humanistic medical education. I have authored 267 Web of Science-indexed publications, including 177 as first or corresponding author, accumulating over 6,700 citations with an H-index of 42. I have led competitively funded research projects, established extensive international research collaborations and supervised 25 doctoral graduates. My academic contributions also include postgraduate research training, international adjunct professorships and editorial leadership as Associate Editor of Vaccine and Human Vaccines & Immunotherapeutics.