On June 3, 2019, Sybil Tasker, M.D., MPH notified Altimmune, Inc. of her resignation as Chief Medical Officer of the Company, effective as of June 30, 2019. To facilitate an orderly transition, Dr. Tasker is expected to provide consulting services to the Company through December 31, 2019. The Company has commenced a search for Dr. Tasker's replacement.