Table 1: CDC Panel for interpretation of Hepatitis B serology results
HBsAg	Anti-HBs IgG	Anti-HBc IgG	Anti-HBc IgM	Interpretation
Negative	Negative	Negative	Negative	Susceptible
Negative	Positive	Negative	Negative	Immune due to hepatitis B vaccination
Negative	Positive	Positive	Negative	Immune due to natural infection
Positive	Negative	Positive	Positive	Acutely infected
Positive	Negative	Positive	Negative	Chronically infected
Positive	Positive	Positive	Negative	Chronic carrier
Positive	Positive	Negative	Negative	Chronic carrier with possible false negative anti HBc test
Positive	Negative	Negative	Negative	Chronic carrier with possible false negative anti HBc test
Negative	Negative	Positive	Negative	Indeterminate: Four interpretations possible: Maybe recovering from an acute HBV infection Distantly immune and test not sensitive enough to detect very low levels of anti-HBs in serum Carrier with undetectable level of HbsAg Susceptible with false positive anti-HBc
Source: CDC- Viral Hepatitis B. Interpretation of the hepatitis B panel.