Hepatitis B Revaccination for Individuals with Undetectable Antibodies

Assessment and Revaccination

For individuals who received hepatitis B vaccination and now have undetectable antibodies, the Centers for Disease Control and Prevention recommends a single booster dose of hepatitis B vaccine rather than repeating the entire series 1, 2
Individuals who have documentation of a complete hepatitis B vaccine series but show no detectable antibodies years later should receive a single booster dose of hepatitis B vaccine 1, 3
Pre-exposure assessment of current anti-HBs levels followed by appropriate revaccination helps ensure protection against future exposures 1

Administer a single booster dose of hepatitis B vaccine to individuals with documented complete vaccination series 1, 3
Test for anti-HBs 1-2 months after the booster dose to confirm response 3
If anti-HBs remains low after the booster dose, complete a second full 3-dose series 4, 5

Anti-HBs levels ≥10 mIU/mL are considered protective 3, 4
Immunocompetent persons with documented anti-HBs ≥10 mIU/mL after vaccination have long-term protection and do not need further periodic testing 3, 5
Persons who do not develop protective antibody levels after revaccination should be tested for HBsAg to rule out chronic infection 4

Individuals at high risk of exposure may benefit from more aggressive revaccination protocols 6, 7

Do not restart the entire vaccination series without first trying a single booster dose, as this may be sufficient to stimulate an anamnestic response 1, 3
Avoid unnecessary testing after booster vaccination if the individual is not at high risk for exposure 3
Do not delay vaccination while waiting for serologic test results in individuals at risk of exposure 8