Ifabotuzumab (KB004) is an IgG1κ antibody targeting EphA3 (KD=610 pM). Ifabotuzumab induces tumor cell apoptosis, activates Antibody-dependent cell mediated cytotoxicity (ADCC), and damages tumor vasculature. Ifabotuzumab reduces human idiopathic pulmonary fibrosis (IPF) CCR10+ cells and improves pulmonary fibrosis.