Hepatitis B Surface antibody (Anti HBs) test checks for the presence of special proteins called antibodies in your blood that your body makes after getting the Hepatitis B vaccine or recovering from a Hepatitis B infection. These antibodies show if you are protected against the Hepatitis B virus, which can cause serious liver problems. Doctors use this test to find out if you are immune to Hepatitis B, to check if the vaccine worked, or to see if you have recovered from a past infection. It is a simple blood test and does not require fasting.

What it Measures

The Hepatitis B Surface Antibody test looks for antibodies your body produces in response to the Hepatitis B virus surface antigen. Here’s what it measures:

Immunity Status:
The main purpose is to see if you have enough antibodies (Anti-HBs) to protect you from Hepatitis B. If these antibodies are present, it means your body can fight off the virus if you are exposed to it.
Response to Vaccination:
After you get the Hepatitis B vaccine, your body should produce these antibodies. The test checks if the vaccine has worked and if you are now immune.
Recovery from Infection:
If you had Hepatitis B in the past and recovered, your body will make these antibodies. The test helps confirm that you have recovered and are now protected.
Need for Further Action:
If you do not have enough antibodies, your doctor may suggest getting vaccinated or a booster shot. If you have been exposed to Hepatitis B and do not have antibodies, you may need more tests or treatment.

Why is it Important

Confirms Immunity:
This test tells you if you are protected against Hepatitis B, which is important for your health, especially if you are at risk of exposure.
Monitors Vaccine Effectiveness:
After vaccination, it checks if your body has responded properly. This is especially useful for healthcare workers, newborns, and people with weak immune systems.
Guides Medical Decisions:
If you are not immune, your doctor can recommend getting vaccinated or a booster shot to keep you safe from infection.
Prevents Disease Spread:
Knowing your immunity status helps protect your family and community, as Hepatitis B can spread through blood and body fluids.
Supports Special Situations:
For pregnant women or people with liver problems, this test helps doctors plan the best care to avoid complications.

When Should I Get This Test?

If you have received the Hepatitis B vaccine and want to check if you are immune.
If you have recovered from Hepatitis B and need to confirm your immunity.
If you are at higher risk of infection, such as healthcare workers or people with chronic illnesses.
If your doctor suspects you were exposed to Hepatitis B through blood or body fluids.
If you are pregnant or planning pregnancy, to ensure protection for you and your baby.

Interpretation of Test Results

Understanding what your results might mean is helpful, but always discuss them with a doctor for a proper diagnosis.

Result Type	What it Means
Normal	You have enough antibodies. You are immune to Hepatitis B and protected.
Borderline	Your antibody levels are low. You may need a booster shot or more monitoring.
Abnormal	No antibodies found. You are not immune and may need vaccination or more tests.

(Note: Specific normal ranges can vary slightly between labs and depending on individual factors. Always refer to the ranges provided on your report and consult your doctor.)

Additional Information

This test cannot tell if you are currently infected with Hepatitis B; it only checks for immunity.
If your results are abnormal, your doctor may suggest more tests to check for active infection or liver health.
Always share your results with your healthcare provider for the best advice and next steps.

Test Requirements

Sample Type: Blood sample (drawn from a vein in your arm).
Fasting: Not required; you can eat and drink normally before the test.
Precautions: Inform your doctor about any medicines or health conditions before the test.

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FAQs

Do I need to fast before taking the Hepatitis B Surface Antibody test?
No, fasting is not required for this test. You can eat and drink as usual before your blood sample is taken.
What should I do if my test shows I am not immune to Hepatitis B?
If your results show low or no antibodies, your doctor may recommend getting the Hepatitis B vaccine or a booster shot to help protect you from infection.
Can this test tell if I currently have Hepatitis B?
No, this test only checks if you have antibodies, meaning you are immune. It does not detect current infection. If needed, your doctor may order other tests to check for active Hepatitis B.
Is the test safe during pregnancy?
Yes, this blood test is safe during pregnancy. It is often recommended for pregnant women to ensure they are protected and to prevent passing the virus to the baby.
What are the next steps after getting my results?
Share your results with your doctor. If you are immune, no further action is needed. If not, your doctor will guide you on vaccination or further tests based on your health needs.

For more information, see Netmeds Health Library: Hepatitis Decoded: Ways To Prevent

Hepatitis B Surface antibody (Anti HBs)

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Customers