This clinical trial is focused on studying a condition called Relapsing-Remitting Multiple Sclerosis (RRMS), which is a type of multiple sclerosis where patients experience episodes of new or worsening symptoms followed by periods of recovery. The study is testing a treatment called BIIB017, also known as Peginterferon beta-1a. This medication is given as an injection and is designed to help manage the symptoms of RRMS.
The purpose of the study is to evaluate the safety and effectiveness of BIIB017 in children and teenagers aged 10 to less than 18 years who have RRMS. Participants in the study will receive either the study medication or a different treatment for comparison. The study will be conducted in two parts. In the first part, the focus will be on understanding how the body processes the medication and its immediate effects. In the second part, the study will look at the long-term safety and outcomes of using BIIB017 over an extended period.
Throughout the study, participants will have regular check-ups to monitor their health and any changes in their condition. This will include assessments of their symptoms, overall well-being, and any side effects they may experience. The study aims to provide valuable information on how BIIB017 can be used to treat RRMS in younger patients, helping to improve their quality of life and manage their symptoms more effectively.



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