A Safety and Tolerability Study of BIVV020 in Adults With Cold Agglutinin Disease

Inclusion criteria : * Male and/or female patients, ≥ 18 years of age with cold agglutinin disease as defined by: 1. Chronic hemolysis per Investigator's judgement, 2. Polyspecific direct antiglobulin test (DAT) positive, 3. Monospecific DAT strongly positive for C3d, 4. Cold agglutinin (CAg) titer ≥ 64 at 4 C; and, 5. IgG DAT ≤1+. * A hemoglobin level ≤11 mg/dL. * A total bilirubin level above the normal reference range that is thought to be due to hemolysis. * Documented vaccinations against encapsulated bacterial pathogens (Neisseria meningitidis, including serogroup B meningococcus and Streptococcus pneumoniae) within five years of screening or willing to complete protocol specified vaccinations. * Having given written informed consent prior to undertaking any study-related procedure. Exclusion criteria: * Cold agglutinin syndrome secondary to infection, rheumatologic disease, or known high grade hematologic malignancy, or known solid organ tumor. * Clinically relevant infection of any kind within one month preceding screening. * Treatment with anti-CD20 monotherapy within three months or anti CD20 combination therapies within six months prior to screening. * Concurrent treatment with systemic immunosuppressive agents targeting B- or T-cell function and/or cytotoxic agents within 3 months prior to screening. Concurrent treatment with other systemic immunosuppressants within 5.5 half-lives of the drug prior to screening. * Any specific complement system inhibitor within three months prior to screening. * Concurrent treatment with systemic corticosteroids other than a stable daily dose equivalent to ≤10 mg/day prednisone within three months prior to screening. * If female, pregnant or lactating. The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.