Seronorm™ Immunoassay is produced by SERO, a leading control sera producer since 1963. SERO is a Norwegian company providing high quality materials for control and calibration of laboratory and primary health care analytical instruments. Sero's objective is to supply laboratories with highly traceable control materials providing a reliable basis for diagnosis and management of each individual patient. The company philosophy is based on a high ethics level particularly regarding the procurement of raw materials (blood, serum and plasma) and additives.