Hepatitis B (HBV) - eAg
HBeAg is a part of the HBV core antigen and reflects the activity of viral replication. A positive result indicates active HBV replication and high infectivity. The disappearance of HBeAg and the appearance of anti-HBe usually indicate an improvement in the condition, but it does not necessarily mean non-infectivity. In acute hepatitis B, HBeAg may be briefly positive, and persistent positivity may progress to chronic infection. HBeAg testing is used for diagnosing HBV infection, monitoring disease progression, assessing treatment effectiveness, and evaluating the efficacy of new drugs.