AstraZeneca foresees blockbuster sales for Claudin 18.2 ADC, but Ultomiris flops in rare disease on July 28, 2026 Amyotrophic Lateral Sclerosis Anti-Claudin18.2 ADC CMG901 AstraZeneca Claudins Malignant neoplasm of stomach Rare Diseases ravulizumab sonesitatug therapeutic autologous dendritic cells Ultomiris vedotin +