Experimental: NMDAR autoimmune encephalitis (AIE) cohort
Adults and adolescents with definite or probable NMDAR encephalitis
In Part 1, study drug will be administered after all other study related procedures have been performed at a site visit at Weeks 0, 2, 4, and Q4W thereafter. Participants will receive satralizumab according to body weight. Study drug will be administered by SC injection in the abdominal or femoral region after all other study-related procedures have been performed at a site visit.
In Part 2, participants will be asked to choose from one of the following options:
Option 1: continue on randomized, double-blind study drug; Option 2: start open-label satralizumab based on body weight; Option 3: stop study treatment and continue follow-up assessments
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