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Hepatitis B Vaccine??
I was vaccinated 17 years ago and I have seen all over the internet that the vaccine remains effective for at least 20 years.  Does anyone know if this is true?  And also are there any cases where it has worn off earlier?
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It depends on your immunity but too be sure you should check Hbs antibodies if the levels is higher than 10 mIU/mL, you are ok, if not you should be revaccinated.
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