Nima Rezaei gained his medical degree from Tehran University of Medical Sciences and Health Services in 2002 and subsequently obtained MSc in Molecular and Genetic Medicine and PhD in Clinical Immunology and Human Genetics from the University of Sheffield, UK. He also spent a short-term fellowship of Clinical Immunology and Bone Marrow Transplantation in the Newcastle General Hospital. Since 2010, Dr. Rezaei has worked at the Department of Immunology, School of Medicine, Tehran University of Medical Sciences; he is also the Chief Executive Director of the Children's Medical Center Hospital, Tehran and a co-founder and Deputy President of the Research Center for Immunodeficiencies. In addition, Dr. Rezaei is an Honorary Research Fellow at the Department of Infection and Immunity, School of Medicine and Biomedical Sciences, University of Sheffield. Dr. Rezaei has already been the Director of more than 50 research projects and has designed and participated in several international collaborative projects. Dr. Rezaei is an editorial assistant or board member for more than 20 international journals. He has published more than 400 articles in international scientific journals and edited ten further books.