This will be an open-label, non-randomised, multicentre, international study for eligible participants who have completed or exited a parent study and are deemed appropriate for continued benralizumab treatment as judged by the Investigator. Any clinical study conducted with benralizumab (Fasenra) for indications such as asthma, EGPA, HES and future indications from additional parent studies, is potentially a parent study.
Each participant continuing to receive clinical benefit from benralizumab but with no access to the drug after exiting the parent study must be seen at the Investigator site, offered the opportunity to transition to the ROSY-F. The duration of clinical benefit from study treatment for an individual participant can exceed the duration of a clinical trial. To ensure continued supply of treatment to a participant who, as judged by the Investigator, is still receiving benefit when he/she either completes or exits the parent study or when the parent study closes, a roll-over study is the most universally acceptable mechanism for continuing to provide ongoing study treatment.
