Dr Robert R. Redfield is well known for his decades of dedicated work in virology, immunology and clinical research. He has helped lead collaborative research into HIV/AIDS since the beginning of the epidemic during his years as a U.S. Army physician and at the University of Maryland School of Medicine. Dr. Redfield has held multiple advisory positions, including with the President's Advisory Council on HIV/AIDS, the National Institutes of Health and the U.S. Food and Drug Administration. He was the CDC director from March 2018 to January 2021, leading the agency through a period of historic challenges, including the onset of the COVID-19 pandemic.