 He obtained his MD degree from the University of Tehran in 1953 and a PhD degree in immunology from the same university in 1963.From 1952 to 1960 Rahbar pursued mainly clinical activities in Abadan and Tehran, returning to academic life as a postdoctoral fellow in 1959.After earning his PhD, he was promoted to assistant professor in 1963 and to associate professor in 1965 in the Department of Immunology.