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Experience of mandatory nucleic acid test (NAT) screening across all blood organizations in Germany: NAT yield versus breakthrough transmissions

BACKGROUND: Mandatory nucleic acid test (NAT) blood screening was introduced in Germany in 1999 for hepatitis C virus (HCV) RNA and in 2004 for human immunodeficiency virus Type 1 (HIV‐1) RNA. Minimal sensitivity limits of 5000 IU HCV RNA/mL and 10,000 IU HIV‐1 RNA/mL were defined for the individual donation facilitating testing of minipools (MPs). The NAT yield obtained from all blood organizations is summarized. Transfusion‐associated virus transmissions despite NAT screening (“breakthrough transmissions”) are analyzed.