He graduated in medicine from Siriraj Medical School, Mahidol University. He holds postgraduate qualifications in DTM&H (Bangkok), MSc.MCH (London), DTCH (Liverpool), Dip. Thai Board of Pediatrics Infectious Diseases, Dip. Thai Board of Preventive Medicine (Travel Medicine). He was previously Head of the Department of Tropical Pediatrics, Deputy Director of Hospital for Tropical Diseases (Bangkok), and Deputy Dean of Faculty of Tropical Medicine, Mahidol University. He is now the President of Thai Society of Travel Medicine, President of Asia Pacific Travel Health Society, Secretary General of Asian Society for Pediatric Infectious Diseases, Treasurer of International Society of Tropical Pediatrics. His research interests have been in travel medicine, vaccines, tropical medicine, and infectious diseases.