How Long Does Hepatitis B Vaccine Last?

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The effect of hepatitis B vaccine could last at least 30 years in the vaccinated individuals who get the vaccines over 6 months of age. The vaccine ensures a long-term protection against chronic hepatitis B virus infection. The immunity appears to exist even though antibody levels might become too low to be detected.   Keywords: hepatitis B vaccine last; 6 months; chronic hepatitis B; immunity
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