EAG: ~35-40% have complement-inhibitor across UK in National PNH Service, most have ravulizumab initially • Eculizumab considered useful particularly in emergency to avoid thrombosis in newly diagnosed people • Renal failure or pregnancy – typically continue eculizumab (limited safety data for ravulizumab/pegcetacoplan) • ~15% remaining anaemic after C5 inhibitor switch to pegcetacoplan(比例正在增加)