A Master Protocol (AMAZ): A Study of Mirikizumab (LY3074828) in Pediatric Participants With Ulcerative Colitis or Crohn's Disease (SHINE-ON)

Inclusion Criteria:

• Participants from originating studies (I6T-MC-AMBA [NCT05784246], I6T-MC-AMBU [NCT04004611], I6T-MC-AMAM [NCT03926130]) , I6T-MC-AMAY [NCT05509777]) who would, inthe opinion of the investigator, derive clinical benefit from further treatment withmirikizumab

• Participants from prior studies who have completed assessments and procedures atlast visit of originating study and remain on study drug treatment.

• Female participants must agree to contraception requirements.

Exclusion Criteria:

• Participants must not have developed a serious adverse event (SAE) or Adverse Event (AE) in originating study or developed other condition before first visit of StudyAMAZ that continued treatment with mirikizumab would present an unreasonable riskfor the participant.

• Participants must not have had permanently or temporarily stopped study drug in theoriginating study, such that restarting mirikizumab would pose an unacceptable riskfor the participant in Study AMAZ.

• Participants must not have an unstable or uncontrolled illness that wouldpotentially affect participant safety.

• Participants must not be enrolled in the study if, for any reason, being in thestudy would compromise the participant's safety or confound data interpretation.

• Participants must not have adenomatous polyps that have not been removed.

• Participants must not be pregnant or breastfeeding.