Bluebird Bio’s $1.8 million gene therapy Zynteglo is the latest such therapy to suffer from manufacturing issues, causing a delay to its EU launch. The European Medicines Agency (EMA) approved orphan drug Zynteglo (autologous CD34+ cells encoding βA-T87Q-globin gene) – previously known as LentiGlobin – as a one-off treatment for beta-thalassaemia in June. Developer Bluebird Bio has priced the therapy at €1.58 million ($1.8 million). However, a setback due to manufacturing problems means Bluebird is delaying launch to at least…