Memorandum from Professor Cash to SNBTS Board Members entitled HCV donation Testing. The writer explains the need for testing in detail and the consequences of low sensitivity and specificity. Also describes in detail the comparative and vairable statistics of two kits tested using the same samples. Extrapololates the potential number of HCV donations without testing prevalence rate large number of false positives from first kit. These are used to explain the need to pursue full evaluation of the second generation kit.