Dr Zheng Yue-Jie is Head of the Department of respiratory diseases at Shenzhen children’s hospital, China. He received his PhD from the Nan Fang Medical University in 1997, China. He was a fellow at the Faculty of Medicine, Hong Kong University in 1992 to 1993. His current research interests are infectious and allergic diseases in children. He has published more than 200 papers in Chinese, 20 papers in English. He is a member of Chinese Subsociety of Pediatric Pulmonology, Chinese Medical Association (CMA); a member of Society of Microecology, Chinese Preventive Medicine Association (CPMA) and a member of Guangdong Allergic Diseases Committee.