The FDA on November 20, 2018 approved GAMIFANT®, a monoclonal antibody that binds and neutralizes Interferon Gamma, for adult and pediatric (newborn and older) patients with primary Hemophagocytic Lymphohistiocytosis (HLH) with refractory, recurrent or progressive disease or intolerance with conventional HLH therapy. GAMIFANT® is a product of Novimmune SA.