Description
Why It’s Done (Purpose):
1. Determine Immunity to Hepatitis B:
o The test is used to determine if a person has developed immunity to Hepatitis B either through a past infection or successful vaccination.
o A positive anti-HBs result indicates protection against future infection, and the person is considered immune.
2. Evaluate Response to Hepatitis B Vaccination:
o It helps assess whether a person has developed immunity following the Hepatitis B vaccine.
o People who do not develop adequate levels of anti-HBs may require additional doses of the vaccine.
3. Screen for Past Hepatitis B Infection:
o A positive result for anti-HBs, along with negative results for HBsAg (surface antigen) and anti-HBc (core antibody), can indicate previous vaccination rather than infection.
4. Monitor Chronic Hepatitis B Patients:
o It can be used in conjunction with other tests to monitor chronic Hepatitis B patients who may need further treatment or vaccination.
Preparation Guidelines:
• No special preparation is typically required for this test.
• Fasting is not necessary.
• A blood sample is drawn from a vein.
• Inform your healthcare provider about:
o Any previous Hepatitis B vaccinations.
o Any current or past liver conditions or Hepatitis B infections.
o Any recent exposure to the Hepatitis B virus, especially in individuals at high risk (e.g., healthcare workers, individuals with multiple sexual partners).
