As most readers of AoA know, the Hep B vaccine was added to the CDC’s childhood immunization schedule in the early 1990s, requires four doses before a child is eighteen months old, and is the only vaccine on the CDC’s schedule that is recommended to be given on an infant’s first day of life.
What else do we know about this vaccine? Quite a bit, actually. In no particular order:
1) A recent study published in the journal Neurotoxicology called “Delayed Acquisition of Neonatal Reflexes in Newborn Primates Receiving a Thimerosal-containing Hepatitis B Vaccine: Influence of Gestational Age and Birth Weight” found that monkeys who received a Hepatitis B vaccine on the first day of life experienced a significant delay in survival reflexes versus monkeys who received a placebo.
2) A recent study published in the journal the Annals of Epidemiology titled “Hepatitis B Vaccination of Male Neonates and Autism” found that “Boys who received the hepatitis B vaccine during the first month of life had 2.94 greater odds for ASD [autism] compared to later- or unvaccinated boys.”
3) A recent study published in the journal Neurology called “Hepatitis B vaccine and the risk of CNS inflammatory demyelination in childhood” found that the Engerix B vaccine for Hep B (the one my son received) appears to increase the risk of central nervous system inflammatory demyelination.