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Argo Biopharmaceutical Co., Ltd. (Argo Biopharma), a Shanghai-based clinical-stage RNA interference therapeutics company, has received Fast Track Designation from the U.S. Food and Drug Administration for BW-20805, its investigational small interfering RNA therapy targeting prekallikrein for the prevention of hereditary angioedema attacks. The designation comes as the company runs a global Phase II open-label study