Immunology is a therapeutic area that covers the treatment of immune system diseases. Among them are immunodeficiency’s, either primary or secondary, resulting from deficient antibody production by the body, and auto-immune diseases resulting from the production of antibodies directed against a tissue or organ. A therapeutic solution for such rare diseases is immune replacement in the event of an antibody deficiency, or immunomodulation for auto-immune diseases, that regulate the immune system. LFB offers medicinal products for immune diseases, with an immune replacement or immunomodulation mechanism according to the disease. With expert partners, LFB also develops recombinant monoclonal antibodies for certain rare cancers and cases of maternal allo-immunisation.