National Donor Deferral Registry
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The National Donor Deferral Registry, also known as the (NDDR) is a database of individuals who have tested "reactive" for viral agents like human immunodeficiency viruses (HIV), Hepatitis B virus (HBV), and hepatitis C virus (HCV) and are permanently prohibited from donating plasma.[1] NDDR is a registered trademark of the Plasma Protein Therapeutics Association. U.S. regulations require organizations that collect plasma screens for viruses and flag donors and keep a list. The NDDR was established in 1993. This is to help plasma donation centers notify other centers of a donor who has tested positive for one of the listed viruses.