A Study to Learn About the Safety of BIIB091 and Its Effect on Brain Inflammation When Taken Alone or With Diroximel Fumarate (DRF) in Adults With Relapsing Forms of Multiple Sclerosis (MS)
Conditions
- Relapsing Forms of Multiple Sclerosis
Interventions
- DRUG: BIIB091
- DRUG: DRF
- DRUG: Placebo
Sponsor
Biogen