I-Jen Wang's present positions include the following: Chairman, Department of Medical Research; Director, Department of Allergy and Immunology; Visiting Staff of Pediatrics, Taipei Hospital, Ministry of Health and Welfare; Professor, School of Medicine, National Yang-Ming University; Professor, College of Public Health, China Medical University; Principal Investigator, National Health Research Institutes; Instructor at the Taiwan Academy of Pediatric Allergy; and Editor of Journal of Medicine and Health, Nutrients, and the Journal of Pediatric Disease, Frontiers in Medicine. Their expertise includes the following areas: pediatric environmental health; allergies and immunology; microbiome, genetic epidemiology, environmental epigenetics; cohort studies; outbreak investigation management; risk management; smart health care (health management).