Study to Evaluate the Efficacy and Safety of Dimethyl Fumarate (Tecfidera) and Peginterferon Beta-1a (Plegridy) for the Treatment of Relapsing-Remitting Multiple Sclerosis in Pediatric Participants

Key Inclusion Criteria:

Must have a diagnosis of RRMS as defined by the revised consensus definition for pediatric MS
Must have an EDSS score between 0.0 and 5.0.
Must have a body weight of ≥30 kg
Must have experienced ≥1 relapse in the 12 months prior to randomization (Day 1), or must have evidence of asymptomatic disease activity seen on MRI in the 6 months prior to randomization, or ≥2 relapses in the 24 months prior to randomization (Day 1). Relapse is defined as the occurrence of a clinical demyelination event regardless of whether the event is a first or subsequent demyelinating event.

Key Exclusion Criteria:

Participants having primary progressive, secondary progressive, or progressive RMS.
Disorders mimicking MS, such as other demyelinating disorders, systemic autoimmune disorders, metabolic disorders, and infectious disorders.
History of clinically significant cardiovascular, pulmonary, GI, hepatic, renal, endocrinologic, hematologic, immunologic, metabolic, dermatologic, growth, developmental, psychiatric (including depression), neurologic (other than MS), and/or other major disease and/or laboratory abnormality indicative thereof, that would preclude participation in a clinical study
Occurrence of an MS relapse within the 30 days prior to randomization (Day 1) and/or the subject has not stabilized from a previous relapse prior to randomization

NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.