He studied Veterinary Medicine in Yangzhou University from 1980-1984 and earned a Ph.D. degree in 1990 from Nanjing Agricultural University, P. R. China. Dr. Xu received his training in virology and immunology in Ludwig-Maximilians-Universität, Munich, Germany, and Rush University, Chicago. Dr. Xu became a faculty at Rush University since 1996. The main focus of Dr. Xu’s research includes tumor biology, immunology, and diabetes.