This study will follow participants with a disease which is associated with an absence or deficiency in Complement Factor I (CFI) as confirmed in the CFI-001 screening study.~The population will include male and female participants ≥6 months of age (pediatric participants enrolled as permitted by local Institutional Review Board/Independent Ethics Committee). This includes patients with recurrent bacterial infections (eg, meningitis, sepsis, pneumonia, endocarditis, otitis) and patients with autoimmune and immune complex-mediated diseases (eg, glomerulonephritis, systemic lupus erythematosus, leukocytoclastic vasculitis, Bickerstaff encephalitis, meningoencephalitis).
This study will follow participants with a disease which is associated with an absence or deficiency in Complement Factor I (CFI) as confirmed in the CFI-001 screening study.