Safety and Efficacy Extension Study of Daclizumab High Yield Process (DAC HYP) (BIIB019) in Participants Who Have Completed Study 205MS202 (NCT00870740) to Treat Relapsing Remitting Multiple Sclerosis

Primary Objective is to assess the safety of extended treatment with Daclizumab High Yield Process (DAC HYP, BIIB019) monotherapy in participants with relapsing remitting multiple sclerosis (RRMS). Secondary Objective is to assess the long-term immunogenicity of DAC HYP and to assess the durability of response to DAC HYP in preventing multiple sclerosis (MS) relapse, slowing disability progression, and reducing new MS lesion formation in this study population.