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A member asked:
As a kid, i had only 2 doses of hep b vaccine. how long should it's affect lasts? i'm 26 now and wondering if i need a boost for hep b vaccine.
A doctor has provided 1 answer
Hard to say: Failure to complete the primary series does increase risk that a protective level of antibody was not/is not present (10mIu/ml). However, that level is often low 2 decades after the infant immunizations in normal people. The risk of chronic Hep B after infection is highest in infants/children (up tp 90%) while it drops to 5% in normal adults. Another way to look at it would be your personal risk.
Answered 4/1/2019
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