All newborns with a birth weight of at least 2,000 grams (4.4 pounds) should receive the hepatitis B vaccine within 24 hours of birth, according to a new policy statement by the American Academy of Pediatrics that brings its recommendations in line with those of the Advisory Committee on Immunization Practices at the Centers for Disease Control and Prevention.
“The birth dose can prevent infection of infants born to infected mothers in situations in which the mother’s results are never obtained, are misinterpreted, are falsely negative, are transcribed or reported to the infant care team inaccurately, or simply not communicated to the nursery,” announced the new statement from the AAP Committee on Infectious Diseases and the Committee on Fetus and Newborn (Pediatrics. 2017 Aug 28. doi: 10.1542/peds.2017-1870).
A dose of the hepatitis B vaccine within 24 hours of birth is 75%-95% effective at preventing perinatal hepatitis B transmission. “When postexposure prophylaxis with both hepatitis B vaccine and hepatitis B immune globulin (HBIG) is given, is timed appropriately, and is followed by completion of the infant hepatitis B immunization series, perinatal infection rates range from 0.7% to 1.1%,” according to the statement.
CDC/Dr. Erskine Palmer
This digitally colorized transmission electron micrograph reveals the presence of hepatitis B virions. The large round virions are known as Dane particles.
Approximately 1,000 newborns still contract perinatal hepatitis B infections every year. Of these, 90% will develop chronic hepatitis B infections, and a quarter of those who don’t receive treatment will die from liver cirrhosis or cancer. There has been an increase in the incidence of new hepatitis B infections in some states because of opioid epidemic in the United States, according to MMWR reports.
The cost effectiveness of preventing hepatitis B with the vaccine and, when necessary, HBIG, is estimated at $2,600 per quality-adjusted year of life. The most common side effects reported after hepatitis B administration are pain (3%-29%), erythema (3%), swelling (3%), fever (1%-6%) and headache (3%).
There has been extensive analysis of the safety of hepatitis B vaccines, the policy statement indicated. Analysis of Vaccine Safety Datalink data has found no causal link between administration of the hepatitis B vaccine and the following: neonatal sepsis or death, rheumatoid arthritis, Bell’s palsy, autoimmune thyroid disease, hemolytic anemia in children, anaphylaxis, optic neuritis, Guillain-Barré syndrome, sudden-onset sensorineural hearing loss, or other chronic illnesses.
Specific recommendations
• Infants born to mothers who test positive for hepatitis B surface antigen (HBsAg): Administer the hepatitis B vaccine and HBIG within 12 hours of birth.
• Infants weighing at least 2,000 g and born to mothers who are HBsAg negative: Administer the hepatitis B vaccine within 24 hours of birth.
• Infants weighing less than 2,000 g and born to mothers who are HBsAg negative: Administer the hepatitis B vaccine at hospital discharge or at age 1 month (whichever is first).
• Infants weighing at least 2,000 g and born to mothers with an unknown HBsAg status: Administer the hepatitis B vaccine within 12 hours of birth and HBIG by hospital discharge or age 7 days (whichever is first) if HBsAg status remains unknown or is confirmed positive.
• Infants weighing less than 2,000 g and born to mothers with an unknown HBsAg status: Administer the hepatitis B vaccine within 12 hours of birth and then HBIG within 12 hours unless the mother tests negative for HBsAg by then.