Two HCV antibody tests (EIA 2.0 [EIA2], Abbott; and the Version 3.0 ELISA [EIA3], Ortho) are currently licensed for screening of US blood donors. Testing of donors for HCV RNA allows comparison of the sensitivities of the two antibody-screening assays.
Stanford Medical School Blood Center, Department of Pathology, Stanford University School of Medicine, Palo Alto, California 94304, USA. susangal@stanford.edu
