Table 3 Number of children, adolescents and adults according to the combination of results for the detection of serologic markers for HB infection and interpretation of results
Serologic markers | Children(6 mos- < 5 yrs) | Adolescents(16–20 yrs) | Adults(21–49 yrs) | Adolescents + Adults(16–49 yrs) | ||||
|---|---|---|---|---|---|---|---|---|
Combination | HBsAg | anti-HBc | anti-HBs | |||||
1 | - | - | - | 8* | 94 | 232 | 326 | susceptible, never infected |
2 | + | - | - | 0 | 4 | 4 | 8 | early acute infection |
3 | + | + | - | 0 | 3 | 6 | 9 | acute or chronic infection |
4 | - | + | - | 0 | 1 | 21 | 22 | past infection or false positive (i.e. susceptible), or “low level” chronic infection |
5 | - | + | + | 0 | 7 | 46 | 53 | Past infection; recovered and immune |
6 | + | - | + | 0 | 0 | 0 | 0 | ------- |
7 | - | - | + | 424 | 15 | 59 | 74 | Immune due to hepatitis B vaccine |
8 | + | + | + | 0 | 0 | 2 | 2 | Acute or chronic infection |
Total | 432 | 124 | 370 | 494 | ||||