Professor Leung graduated from The Chinese University of Hong Kong in 1992, and obtained Doctor of Medicine degree at his alma mater in 2004.  He received Immunology and Allergy subspecialty training in The Hospital For Sick Children in Toronto, Canada in 1997-98.  Professor Leung is currently a professor in Department of Paediatrics at The Chinese University of Hong Kong, and a Visiting Professor of the Central South University in mainland China.  Professor Leung is a Co-Chair of Microbiome and Biodiversity Committee of Asia Pacific Association of Allergy, Asthma and Clinical Immunology and Immediate Past President of Hong Kong Society for Paediatric Immunology, Allergy and Infectious Diseases.  He has published more than 430 articles in peer-reviewed journals with an H-index of 48.  His main research interests include natural history, novel diagnostics, genetics and host-microbe interactions of allergic diseases.