A blood test is necessary to diagnose hepatitis B. There are several tests used in the detection and management of hepatitis B. Intially the three blood tests that will be performed are:
- Hepatitis B surface antigen (HBsAg)
Determines if you are infected (acute or chronic infection)
- Antibody to HBsAg (Anti-HBs)
Determines if you have immunity to HBV either through a past cleared infection or hepatitis B vaccination
- Antibody to core antigen (Anti-HBc)
Determines if you have been previously infected with HBV (not present after HBV immunization)
It is important to note that these are not the only tests for hepatitis B. There are other tests that may be performed for monitoring and treatment.