How can I check if I’m immune to hepatitis B? If you don’t know whether or not you are immune, your doctor can do a blood test to check. Most babies born in Australia after 1 May 2000 had the hepatitis B vaccine at birth. They would have also had a few follow-up doses. Children who were at high school after this date may also have had the vaccine. This may have been through a school catch-up immunisation program. Find out more about vaccination against hepatitis B References Hepatitis B serology, Australian Family Physician Updated 6 March 2023 Manage Cookie Preferences