Human plasma based controls mimic patient samples Independent controls meet compliance requirements of regulatory agencies and professional organizations Liquid, ready-to-use: no reconstitution or special handling required Extended shelf life means efficiency: allows user to monitor assay performance with same lot over an extended period of time Manufactured from human serum or plasma Reactive for HCV RNA type 1 and nonreactive for HBsAg and antibodies to HIV 1 and HIV 2 and HTLV For in vitro diagnostic use