MBU develops and markets a variety of immunoassays for the diagnostics of human infectious diseases. Recently an upgraded sandwich-type HBV ELISA kit is designed by the company. It has been prepared for market entry. This new high sensitivity HBs/HBc-Ag/Ab test kit can be used for both simultaneous and separate detection of hepatitis B virus surface antigen (HBsAg) and total antibodies to hepatitis B virus core antigen (anti-HBcAg) in human serum and plasma. Such opportunity can reduce the total time of HBsAg and anti-HBcAg tests performance and the cost to the consumer.