Table 2 Case definitions to determine HBV infection and vaccination status
From: Improving the identification of priority populations to increase hepatitis B testing rates, 2012
Infection status | |
Unknown HBV status | No history of HBV testing |
Chronic hepatitis B | HBsAg detected and/or HBV viral load detected |
Immunity status | |
CHB-negative and HBV susceptible (not vaccinated and no evidence of natural immunity) | HBsAg not detected and Anti-HBs not detected |
CHB-negative and immune (vaccine-derived immunity or natural immunity) | HBsAg not detected and Anti-HBs detected |
CHB-negative with insufficient information to determine immunity status | HBsAg not detected and Anti-HBs unknown |