Abstract Isidor D. Bronfin was born in 1886 in Russia and migrated to the United States in 1902. He earned a medical degree from the University of the State of New York in 1911--the same year that he became a U.S. citizen. Bronfin was a noted authority on tuberculosis treatment and authored several publications on the topic. Within the Colorado medical community and at the national level, he served in a number of leadership roles including medical director of the Jewish Consumptives' Relief...