Hepatitis B Vaccination Guidelines for Special Populations

Administration of Birth Dose

• For infants born to HBsAg-positive mothers, the birth dose must be given within 12 hours along with HBIG at a separate anatomical site, as recommended by the Centers for Disease Control and Prevention (CDC) 1, 2
• The World Health Organization (WHO) suggests administering the birth dose up to 7 days after birth to improve coverage 1

Vaccination Schedule for Infants Born to HBsAg-Positive Mothers

• The first dose plus HBIG should be administered within 12 hours of birth at separate injection sites, followed by a second dose at 1-2 months of age and a third dose at 6 months of age, as recommended by the CDC 1
• Post-vaccination serologic testing should be performed at 9-15 months of age for HBsAg and anti-HBs, according to the American Academy of Pediatrics (AAP) 3

Vaccination Schedule for Infants Born to Mothers with Unknown HBsAg Status

• The hepatitis B vaccine should be administered within 12 hours of birth, and maternal blood should be drawn for HBsAg testing immediately, as recommended by the CDC 2
• If the mother tests positive, HBIG should be administered as soon as possible, no later than 7 days of birth, according to the WHO 2

Common Pitfalls to Avoid

• The birth dose should not be delayed beyond 24 hours for institutional deliveries, as this significantly increases infection risk, particularly for infants born to HBsAg-positive mothers, as stated by the AAP 3
• The vaccine series should not be restarted if interrupted; instead, continue where you left off, maintaining minimum intervals of 4 weeks between doses 1 and 2, and 8 weeks between doses 2 and 3, as recommended by the CDC 3, 4