In a setback for Astrazeneca plc's plans to tackle previously untreated cases of advanced bladder cancer, neither its immune checkpoint inhibitor, Imfinzi (durvalumab), nor a pairing of it with the investigational drug tremelimumab beat standard-of-care (SOC) chemotherapy in improving overall survival (OS) during a phase III trial evaluating the treatments as first-line (1L) care for patients with advanced disease.