North America, representing 45% of the acquired orphan blood diseases therapeutics market, remains the largest region due to robust R&D investments, advanced healthcare infrastructure, and favorable regulatory frameworks. The FDAโs Orphan Drug Act incentives, coupled with high patient adoption rates, drive innovation. Europe (30%) follows closely, fueled by the EMAโs streamlined approvals, growing public-private partnerships, and a mature biopharma ecosystem. Asia Pacific (15%), the fastest-growing region, is propelled by rising disease prevalence, expanding biotech hubs in India and China, and government initiatives to improve access.