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When she first joined the Food and Drug Administration (FDA) Center for Biologics Evaluation and Research (CBER) in 1980 she worked in the Division of Biochemistry and Biophysics. She was a crucial part of the development of quality control standards for alpha interferon and participated in the reviews of the first alpha interferon products (Schering-Plough’s Intron A and Hoffmann-La Roche’s Roferon). Dr. Zoon then became the head of the Cytokine Biology Division (1988–1992) where she coordinated the reviews of further indications for the interferon products, including AIDS-related Kaposi’s sarcoma, genital warts and, more recently, Hepatitis C. Dr. Zoon was also involved in the licensing of a third alpha interferon product, Interferon Sciences’ Alferon N. Genentech’s Actimmune (interferon gamma-1b), which was approved in 1990 by Dr. Zoon’s group for the rare disorder of chronic granulomatous disease. In 1991, Dr. Zoon was in charge of the reviews of granulocyte and granulocyte-macrophage colony stimulating factors (Amgen’s Neupogen and Immunex/Hoechst’s Leukine/Prokine).

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