Vaccination against Hepatitis B does not guarantee immunity or protection against the virus. Studies looking at how effective the Hepatitis B vaccine is at protecting babies from the virus are variable. So far they indicate that they are capable of providing adequate immunisation for up to 66% to 100% of babies. Both the H-B-Vax II and Energix B are believed to have similar levels of effectiveness.
The administration of the Hepatitis B Immunoglobulin (HBIG) in combination with the Hep B vaccine (HBV) - which is offered to babies of mothers who are Hepatitis B 'positive'- tend to provide greater levels of protection for babies (usually over 90%).
Long term effectiveness of the full course of the Hepatitis B vaccination schedule (HBV) is unclear. At this stage it is believed that if immunisation is achieved, it should protect the person for up to 5 to 7 years.
Last revised: Thursday, 17 January 2013
This article contains general information only and is not intended to replace advice from a qualified health professional.