Gregg Alton has served as a member of our Board since March 2020. Mr. Alton served as Chief Patient Officer of Gilead Sciences, Inc. ( Gilead ) from August 2018 until January 2020. After joining Gilead in 1999, Mr. Alton held a number of positions at the company in which he gained experience in legal, medical affairs, policy and commercial matters, including General Counsel and Interim Chief Executive Officer. Prior to joining Gilead, he was an attorney at the law firm of Cooley Godward, LLP, where he specialized in mergers and acquisitions, corporate partnerships and corporate finance transactions for healthcare and information technology companies. Mr. Alton served as a member of the board of directors of Renovaro Biosciences Inc., a public biotechnology company, from January 2020 to October 2024. Mr. Alton joined the boards of Novavax, Inc., a public biotechnology company, in November 2020, Brii Biosciences in June 2021, ETR (a non-profit) and Global Antibiotic R&D Partnership (GARDP) in September 2021. He also serves as a member of the board of directors of several private companies, the Hepatitis Fund and the Boys and Girls Clubs of Oakland. Mr. Alton received a B.A. in legal studies from the University of California at Berkeley and a J.D. from Stanford University. Mr. Alton brings to our Board extensive experience in the pharmaceutical industry as a senior executive with responsibilities for legal, regulatory and medical affairs, strategy, operations and patient relations.