Dr Leung was the founding Head, Chinese Medicine Division in the Department of Health, Hong Kong in 1997 and he served in that post until 2003. He was actively involved in establishing a framework for development of Chinese medicine, including regulation, education, research and health services, and in implementing smoothly the regulatory system. He later served as Deputy Director of Health and Head of the Surveillance and Epidemiology Branch. Dr Leung was the Controller, Centre for Health Protection before his retirement from the government service in 2016.
Dr Leung has served for many times since 1997 as WHO temporary advisor in traditional medicine and non-communicable diseases for the World Health Organization.
Dr Leung is a medical graduate from the Trinity College, University of Dublin, Ireland. He obtained the degree of Master of Science in Public Health from the National University of Singapore. He is a Specialist in Community Medicine, a Fellow of the Hong Kong Academy of Medicine (Community Medicine) and a Fellow of the Royal Australasian College of Medical Administrators.
- Ting-Hung Leung and Yu-Kei Fung. Strategies for the development of Chinese medicine – Experience of Hong Kong Special Administrative Region. Chinese Journal of Integrated Traditional and Western Medicine. September 2001, Volume 7, Issue 3, pp 167-169.
- Jaime Sin and Ting-Hung Leung. Regulation of Chinese Medicine in Hong Kong. Public Health & Epidemiology Bulletin. Vol. 11 No. 6, Dec 2002.
- Ting-Hung Leung. The epidemiological findings and the experience in the prevention and control of SARS in the Hong Kong Special Administrative Region. National Medical Journal of China. Jun 2003, Vol. 83, No. 11, 902-5
- King-Fai Cheung and Ting-Hung Leung. Recent Incidence and Mortality Trend of Colorectal Cancer in Hong Kong. Public Health & Epidemiology Bulletin. Vol. 16 No. 3, Sep 2007.
- Jacqueline Choi, Amy NY Wong, Ka-Yiu Yuen and Ting-Hung Leung. Pattern of Alcohol Use and Binge Drinking among the Population in Hong Hong. Public Health & Epidemiological Bulletin.Vol.16 No.3, Sep 2007.
- So-Lun Lee, Tai-Hing Lam, Ting-Hung Leung, Mary Schooling, Gabriel M Leung and Yu-Lung Lau. Foetal exposure to maternal passive smoking is associated with childhood asthma, allergic rhinitis and eczema. Scientific World Journal. 2012;2012:542983. 2012 Aug 13.