The main purpose of this study is to evaluate the long-term efficacy of mirikizumab in pediatric participants with ulcerative colitis (UC) or Crohn's disease (CD). The study will last about 172 weeks and may include up to 44 visits. Additional treatment may be available to participants via a Continued Access Period.
A Master Protocol for a Phase 3, Multicenter, Open-label, Long-term Extension Study to Evaluate the Long-term Efficacy and Safety of Mirikizumab in Children and Adolescents With Moderate-to-severe Ulcerative Colitis or Crohn's Disease