Agenus Inc. announced the appointment of Dr. Steven O’Day, MD, as its Chief Medical Officer. Dr. O’Day’s leadership in the immuno-oncology field spans three decades. He was part of a small group of investigators to treat the first patients with the first checkpoint antibody, an anti-CTLA-4 molecule, ipilimumab. Dr. O’Day has been a principal investigator for more than 200 clinical trials, including international pivotal trials in which he has held leadership roles. He currently serves as Executive Director of the John Wayne Cancer Institute and Cancer Clinics at Providence St. John’s Health Center and Director of the Melanoma and Cutaneous Oncology Research Center.