An Open-Label Multicenter Study to Evaluate the Pharmacokinetics, Pharmacodynamics, and Safety of Inebilizumab in Pediatric Subjects With Neuromyelitis Optica Spectrum Disorder

Inclusion Criteria: * Male or female participants, minimum body weight of 15 kg, age 2 to \< 18 years at the time of screening. * Positive serum anti-AQP4-IgG result at screening and diagnosed with NMOSD according to the criteria of Wingerchuk et al, 2015. * Documented history of one or more NMOSD acute relapses within the last year, or 2 or more NMOSD acute relapses within 2 years prior to screening. Exclusion Criteria: * Any condition that, in the opinion of the Investigator, would interfere with the evaluation or administration of the Investigational Product or interpretation of particip…