* Albert B. Sabin Vaccine Institute, "2007 Albert B. Sabin Gold Medal awarded to Hilary Koprowski", booklet and PDF file, Washington, D.C., 2007 Award Ceremony and speeches* "Directory PIASA Members, 1999", New York City, Polish Institute of Arts and Sciences of America, 1999.
Nato a Berlino, la sua famiglia contava nomi importanti come il celebre neurologo Richard Cassirer e il filosofo Ernst Cassirer.