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Vaccine doubt
I'm 26 M and received the complete Hepatitis B vaccine series as an infant. A recent blood test showed my anti-HBs titer (HBsAb) dropped below the protective threshold (
Answers (17)
If titre less then 10
Get a booster dose
Next Steps
Consult for more
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As you completed your HepB vaccine course as an infant.
You have to Take one booster dose
and then retest after 1-2 months.
If it is still below 10 then you have to finish the second full series of vaccination.
Stay healthy,be positive.
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kindly do connect and consult with me for better treatment plan and advice on your case via PRACTO app
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If the anti hbs titre is lower than the 10 mlU ,take a booster dose
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Doesn't mean you lost protection; please book a consultation with me to review your report and risk factors and determine whether a booster or further testing is needed.
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Dr. Rimsha Indrabi
General Physician
3 yrs exp
Srinagar
You need to take booster dose since you threshold level is low
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Ms. Alisha Bansal
Consultant Physician
3 yrs exp
Gwalior
A low anti-HBs titre years after vaccination does not necessarily mean you have lost immunity, as immune memory may persist. If you are a healthcare worker or immunocompromised, a booster or further testing may be needed. Please share your exact anti-HBs level and HBsAg status for appropriate guidance.
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Dr. Somen Singh Naharawat
General Physician
2 yrs exp
Jaipur
Go for booster dose
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Dr. Sozab Malik
General Physician
2 yrs exp
Aligarh
If Your HBsAb is lower than <10
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Dr. Praful Mahamuni
General Practitioner
20 yrs exp
Nagpur
Hello,
Take Balanced diet.
For diet details and ePrescription consult by practo app.
Thanks.
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Dr. Shubham Pandey
General Practitioner
3 yrs exp
Kanpur
If Anti HBsAb titer is belo 10 MIU then take 1 booster dose... what next to do like.. when you repeat titre value test and how much is the risk factor, if titers are not raising after booster dose... for all this you can just book an appointment
Next Steps
with your report, consult a physician
Health Tips
don't be panic
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Dr. Gaurav Jaiswal
General Physician
7 yrs exp
Jhansi
Avoid fried and spicy food .
Water intake more
Green leafy vegetables more
Fiber meal
Walk
Do connect and consult
Will help you
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Ms. Ayushi Yadav
General Physician
1 yrs exp
Meerut
do consult me for further information
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Dr. Divyansh Jain
General Physician
1 yrs exp
Ghaziabad
Hello,
Your concern is understandable. An anti-HBs level below 10 mIU/mL many years after completing hepatitis B vaccination does not necessarily mean you have lost immunity.
In healthy individuals, antibody levels naturally decline over time, but immune memory can persist for decades.
If you completed the full vaccine series during infancy and have a normal immune system, routine booster doses or repeat antibody testing are generally not required.
One booster dose often triggers an immune memory response. However, whether further testing is necessary depends on your occupation, immune status, and risk of hepatitis B exposure.
Next Steps
1. If you are a healthy adult without occupational exposure risks: No additional booster doses or routine antibody testing are generally necessary.
2. If you are a healthcare worker or at increased occupational risk: Repeat anti-HBs testing 1–2 months after the booster.
3. If anti-HBs remains below 10 mIU/mL, additional vaccine doses may be recommended according to the revaccination protocol.
4. If you have immunodeficiency, are receiving dialysis, or take immunosuppressive medication, an individualised vaccination and monitoring plan may be necessary.
Health Tips
My recommendation: If you are otherwise healthy and have completed your childhood hepatitis B vaccination series, low antibody levels alone do not mean you need another complete vaccination series.
If you work in healthcare or have frequent exposure to blood or body fluids, checking anti-HBs 1–2 months after your recent booster is appropriate. A level ≥10 mIU/mL confirms an adequate response.
Keep your vaccination records available and avoid taking additional doses unnecessarily without medical guidance.
Wishing you good health!
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Dr. Anuj Mothsra
General Practitioner
7 yrs exp
Jhunjhunu
Can help you kindly consult and provide detailed history for proper diagnosis and further management
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Dr. Suraj Sharma
General Practitioner
4 yrs exp
Jaipur
Do consult
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Dr. Ankita Gahlot
Obstetrician
12 yrs exp
Bangalore
For someone who completed the full childhood Hepatitis B series, a single booster dose after a low anti-HBs titer is usually considered enough for most healthy adults, and most guidelines don't call for routine retesting afterward unless there's an ongoing exposure risk.
Next Steps
If you don't fall into a high-risk group, your doctor's advice to stop here fits standard practice. If you do have extra exposure, mention that specifically and ask whether a repeat titer check makes sense for you.
Health Tips
If you work in healthcare, are on dialysis, or have a condition affecting immunity, please consult your physician about this, since it can change whether retesting is useful.
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.