Professor Leung graduated from The Chinese University of Hong Kong in 1992, and received subspecialty training on Immunology and Allergy in the Hospital for Sick Children in Toronto, Canada in 1997-1998. He was awarded Doctor of Medicine degree in 2004 for his research works on chemokine genetics and immunology in asthmatic children. Professor Leung is currently Chairman of Department of Paediatrics of The Chinese University of Hong Kong and consultant-in-charge for paediatric allergy service at its affiliated Prince of Wales Hospital. He was elected as an International Fellow of the American Academy of Allergy, Asthma and Immunology in 2011. Professor Leung is currently the Secretary-General of the Asia Pacific Association of Pediatric Allergy, Respirology and Immunology, Member-at-Large of Asia Pacific Association of Allergy, Asthma and Clinical Immunology, and Vice President of the Hong Kong Society for Paediatric Immunology, Allergy and Infectious Diseases. Professor Leung published more than 320 refereed journal articles and supervised 7 postdoctoral fellows and 26 postgraduate students. He has served as editor, editorial board member or reviewer for over 60 international journals in the fields of allergy, immunology, infectious diseases, pulmonology and genetics.