Evaluation of PK, PD, Efficacy, Safety, and Immunogenicity of IV Ravulizumab in Pediatric Participants With Generalized Myasthenia Gravis

Prior treatment

• History of thymectomy, thymomectomy, or any thymic surgery within the 12 months prior to Screening
• Known or suspected history of drug or alcohol abuse or dependence within 1 year prior to the start of the Screening Period

Other illness

• Medical Conditions
• Any untreated thymic malignancy, carcinoma, or thymoma.
• Participants with a history of treated benign thymoma
• History of N meningitidis infection
• Known to be human immunodeficiency virus (HIV) positive
• History of unexplained infections

• Diagnosis of gMG confirmed by a positive serologic test for anti-AChR antibodies (Abs) obtained at Screening and/or during Screening Period
• Myasthenia Gravis Foundation of America (MGFA) Clinical Classification of Class II to Class IV at Screening
• Participants receiving treatment must be on a stable dosing regimen of adequate duration prior to Screening and during the Screening Period.
• Eculizumab-experienced participants must have been enrolled and treated with eculizumab in Study ECU-MG-303 for at least 6 months (180 days) and must have been on a stable dose for ≥ 2 months (60 days) prior to Screening.
• All participants must be vaccinated against meningococcal infection