Biotechnology Initial results from the ALXN1210-TMA-314 Phase III trial showed that UK pharma major AstraZeneca’s Ultomiris (ravulizumab) demonstrated clinically-meaningful overall survival at 26 weeks in pediatric patients (aged 28 days to <18 years of age) with thrombotic microangiopathy (TMA) after hematopoietic stem cell transplantation (HSCT). 16 June 2025