He grew up in Pakistan and studied medicine at the King Edward Medical College in Lahore, Pakistan. He moved to the United States in 1992 and after completing a residency in Internal Medicine at University of Connecticut in Farmington, joined the University of Minnesota in Minneapolis for a fellowship in Hemaotology and Bone Marrow Transplantation. Since 1999, Dr. Toor has held faculty appointments at the University of Arkansas for Medical Sciences, Loyola University Medical Center, and now VCU. His research interests are in developing safe treatments to harness the power of the human immune system to fight cancer and to study the underlying order in seemingly random biological systems.