Table 5.

Interpretation of HBV results prior to vaccination (1B)

HBsAg	anti-HBs titre	Anti-HBc	Interpretation
–	–	–	Not Immune Has not been infected, but still at risk for possible future infection. VACCINATE
–	+	+	Immune Surface antibodies present due to previous infection, and now recovered. VACCINE NOT NEEDED
–	+	–	Immune Has already been vaccinated. Level of immunity will depend on titre. REFER to medical staff if NO prior history of vaccination VACCINE MAY / MAY NOT BE NEEDED
+	–	+	Hepatitis B Infection Hepatitis B virus is present. REFER to medical staff VACCINE NOT NEEDED
–	–	+	Unclear likely natural immunity - vaccination may be indicated particularly in immunocompromised patients