Adjunct Associate Professor Chong Chia Yin is a Senior Consultant at KK Women's and Children's Hospital, specializing in Paediatric Infectious Diseases. He has extensive experience in clinical and academic settings and holds multiple prestigious appointments. In addition to his role at KK Women's and Children's Hospital, he serves as an Adjunct Associate Professor at prominent institutions such as the Yong Loo Lin School of Medicine and Duke-NUS Graduate Medical School. His clinical interests are focused on infectious diseases in children, and he is actively involved in the SingHealth Paediatrics Residency Programme.

He is recognized for his leadership in various committees, including serving as Chairman of the Ministry of Health's Executive Committee on Immunization and contributing to numerous advisory bodies, such as those addressing bioterrorism threats and COVID-19 vaccination strategies. Professor Chong has received numerous awards, such as the SingHealth Residency Outstanding Faculty Award and the Singapore Health Quality Service Award. His research interests include vaccine effectiveness, the epidemiology of infectious diseases, and the impact of COVID-19 on pediatric populations. His work is widely published, with recent studies on the immunogenicity of vaccines and COVID-19 impacts in children.