Heplisav B is indicated for the active immunisation against hepatitis B virus infection (HBV) caused by all known subtypes of hepatitis B virus in adults 18 years of age and older. The use of Heplisav B should be in accordance with official recommendations. It can be expected that hepatitis D will also be prevented by immunisation with Heplisav B as hepatitis D (caused by the delta agent) does not occur in the absence of hepatitis B infection.