The Instant-View® HBsAg serum test is designed as an initial qualitative test to detect Hepatitis B surface antigen (HBsAg) in human serum at a concentration equal to or higher than 2 ng/ml. Hepatitis B is one of the major causes of hepatitis in humans, usually transmitted by close personal contact. Individuals carrying this virus may not be sick, but a source of infection. The Instant-View® HBsAg serum test is for healthcare professional use only. This product is available for export only.