Table 2 Interpretation of serologic markers: HBV infection status and corresponding percentages
Serologic markers | Interpretation | N = 370 (%) | ||
|---|---|---|---|---|
HBsAg | Anti-HBs | Anti-HBc | Â | Â |
Negative | Negative | Negative | Susceptible | 181 (48.9%) |
Negative | Positive | Positive | Immune after infection | 85 (23.0%) |
Negative | Positive | Negative | Immune after vaccination | 11 (3.0%) |
Positive | Negative | Positive | Current infection | 30 (8.1%) |
Negative | Negative | Positive | Indeterminate: Four possibilities | 63 (17.0%) |
|  |  |  |    i) Resolving infection (Window phase) |  |
|  |  |  |    ii) Remote resolved infection with low anti-HBs |  |
|  |  |  |    iii) Chronic infection with low levels of HBsAg |  |
|  |  |  |    iv) False positive anti-HBc, hence susceptible. |  |