Hepatitis B blood tests (S-HBsAg, S-HBcAg)

If the patient has or has had hepatitis B, screening tests may include HBsAg and HBcAb assays.

HBsAg or hepatitis B virus surface antigen appears in the circulation as early as a couple of weeks prior to the occurrence of clinical symptoms and usually remains for a few months. However, some people who have become infected r...