To be clear: She resigned Facebook in *10/30/2019 (link in body of article, https://about.fb.com/news/2019/10/desmond-hellmann-departs-board/ )
From White House CAST bio link - involved in HIV/AIDS work (Fauci -) & biotech :
// Sue Desmond-Hellmann, M.D., M.P.H., is a physician-scientist who led the development of the first gene-targeted drug for treating breast cancer. Her medical, scientific, and philanthropic career spans 40 years: from academic medicine and clinical practice studying cancer and HIV/AIDS, to running research and product development at some of America’s top biotechnology companies, to leading higher education at one of California’s marquis graduate institutions, to running the world’s largest private foundation. She is the former CEO of the Bill & Melinda Gates Foundation, and previously served as Chancellor of the University of California, San Francisco (UCSF), where she was the first woman to hold that role. //