Efmoroctocog alfa (trade name: Elocta) has been approved since November 2015 for people with type A haemophilia. This is an inherited disorder that impairs blood clotting. The German Institute for Quality and Efficiency in Health Care (IQWiG) examined in a dossier assessment whether this new drug offers an added benefit over the appropriate comparator therapy both in prevention and in on-demand treatment. Such an added benefit cannot be derived from the dossier, however, because it contained no study data adequate for the research question.