The Hepatitis B “e” Antigen (HBeAg) test is a crucial blood test that helps determine whether the Hepatitis B virus is actively replicating in your liver. HBeAg is a viral protein produced when the virus is highly active, and its presence indicates a higher level of infectivity. A simple blood draw allows the lab to detect this antigen, giving your doctor real-time insight into disease activity. This test is essential for assessing infection severity, monitoring progression, and guiding decisions on antiviral therapy. By providing precise information about viral activity, it helps your doctor plan timely, targeted care to protect your liver.