Positive results on screening test for any of the following tests: HCV enzyme immunoassay (EIA) repeat reactive/ recombinant immunoblot (RIBA) confirmed, HBV/HCV NAT, HTLV-I/II antibodies, T.cruzi antibodies, HBsAg, or serologic test for syphilis (with positive confirmatory treponemal-based assay), unless the patient has received adequate therapy for syphilis. Donors with a positive West Nile Virus NAT are deferred for 120 days.