No fasting required.

Hepatitis B is a liver infection caused by the hepatitis B virus (HBV). It is one of several various causes of hepatitis, a condition characteriszed by inflammation and enlargement of the liver.

 

Other causes of hepatitis include, for example, certain drugs, inherited disorders, and autoimmune diseases. HBV is one of five "hepatitis viruses" identified so far. The other four are A, C, D, and E. 

 

HBsAG  is used to screen for & detect infection – it is the earliest indicator of acute infection & may be present before symptoms appear. Also present in patients with chronic infection.