Phase 4 Study Evaluating Efficacy and Safety of Rozanolixizumab in Adult Chinese Participants With Generalized Myasthenia Gravis

Prior treatment

• Study participant has previously received rozanolixizumab drug product
• Study participant has received any vaccine in the 4 weeks prior to the initiation of rozanolixizumab treatment or intends to receive any vaccine within 2 weeks after the last infusion of rozanolixizumab. Note: For participants that are on rozanolixizumab treatment, vaccination with live or live-attenuated vaccines is not recommended. During the whole study period, all other vaccines should take place at least 2 weeks after the last infusion of a Treatment Cycle and 4 weeks before initiating the next cycle
• Study participant has been treated with prohibited immunosuppressants, biologics, and other therapies within the timeframe shorter than the treatment-free period

Other illness

• Study participant has a known hypersensitivity to any components of the study drug or any other anti-neonatal Fc receptor (anti-FcRn) medications
• Study participant has a clinically important active infection including unresolved or not adequately treated infection in the opinion of the investigator
• Study participant with a known tuberculosis (TB) infection, at high risk of acquiring TB infection, or latent tuberculosis infection (LTBI), or current/history of nontuberculous mycobacterial infection (NTMBI)

Other

• Study participant with severe (defined as Grade 3 on the MG-ADL scale) weakness affecting oropharyngeal or respiratory muscles, or who has myasthenic crisis or impending crisis. Note: Impending Crisis is defined as bulbar or respiratory symptoms of a patient who significantly worsens in a short time (≤2 weeks) and meet MGFA IVb or score 3 in one QMG bulbar muscle item, or score 2 in respiratory muscle item, or bulbar+respiratory items score ≥4

• Study participant must be ≥18 years of age at the time of signing the informed consent form (ICF)
• Study participant has documented diagnosis of generalized myasthenia gravis (gMG) at the Screening Visit based on study participant's history and supported by previous evaluation
• Study participant has a confirmed positive record of autoantibodies against acetylcholine receptor (AChR) or muscle-specific kinase (MuSK) documented in the medical history at the Screening Visit
• Study participant has Myasthenia Gravis Foundation of America (MGFA) Clinical Classification II to IV at Screening Visit.
• Study participant with a myasthenia gravis-activities of daily living (MG-ADL) score of at least 3 points from non-ocular symptoms and a quantitative myasthenia gravis (QMG) score of at least 11 at the Screening and Baseline visits in the first Treatment Cycle.
• Study participant is considered for additional treatment by the investigator
• Body weight ≥35kg at the Screening Visit