RecruitingPhase 3Drug trialA Study to Evaluate the Efficacy and Safety of Dapirolizumab Pegol in Study Participants With Moderately to Severely Active Systemic Lupus ErythematosusThe purpose of this study is to evaluate the ability of dapirolizumab pegol (DZP) as an add-on treatment to standard of care (SOC) medication to achieve clinically relevant long term improvement of moderate to severe disease activity.