A Study to Evaluate the Effects of Ocrelizumab on Immune Responses In Participants With Relapsing Forms of Multiple Sclerosis

A Phase IIIB, Multicenter, Randomized, Parallel-Group, Open-Label Study to Evaluate the Effects of Ocrelizumab on Immune Responses in Patients With Relapsing Forms of Multiple Sclerosis

This multicenter, randomized, open-label study will evaluate the immune response to vaccines (tetanus toxoid [TT]-containing adsorbed vaccine, 23-valent pneumococcal polysaccharide vaccine [23-PPV] either unboosted or boosted with 13-valent pneumococcal conjugate vaccine [13-PCV], influenza vaccine, keyhole limpet hemocyanin [KLH]) after administration of a dose of ocrelizumab (OCR) in participants with relapsing multiple sclerosis (RMS).

Inclusion Criteria:

• Diagnosis of RMS in accordance with the revised McDonald criteria
• Received at least one previous immunization against TT or tetanus and diphtheria (DT/Td) or tetanus, diphtheria, and acellular pertussis (DTaP/Tdap)
• Expanded Disability Status Scale (EDSS) at Screening from 0 to 5.5 points, inclusive
• For sexually active female participants of reproductive potential, use of reliable means of contraception

Exclusion Criteria:

• Contraindications for or intolerance to oral or IV corticosteroids, including IV methylprednisolone, according to the country label
• Known presence of other neurologic disorders
• Treatment with any investigational agent within 24 weeks of screening or 5 half-lives of the investigational drug, whichever is longer, or treatment with any experimental procedure for multiple sclerosis