Table 2.
Hepatitis B virus infection status among children born in 2006–2015 by survey site — Ukraine, 2017
| Survey site | Uninfected (anti-HBc-negative) |
Infected, infection cleared (anti-HBc-positive and HBsAg-negative) |
Chronic infection (anti-HBc-positive and HBsAg-positive)* |
||||||
|---|---|---|---|---|---|---|---|---|---|
| No. | Weighted % |
95% CI | No. | Weighted % |
95% CI | No. | Weighted % |
95% CI | |
| Zakarpattya (N=1,268) |
1,212 | 94.8 | 91.3–96.9 | 50 | 4.5 | 2.6–7.9 | 6 | 0.7 | 0.3–1.4 |
| Sumy (N=1,380) |
1,368 | 99.2 | 98.4–99.6 | 11 | 0.7 | 0.3–1.5 | 1 | 0.1 | 0.0–0.4 |
| Odessa (N=1,265) |
1,251 | 99.0 | 97.8–99.6 | 14 | 1.0 | 0.4–2.2 | 0 | 0.0 | 0.0–0.3** |
| Kyiv City (N=683) |
676 | 98.9 | 97.7–99.5 | 6 | 1.0 | 0.4–2.1 | 1 | 0.1 | 0.0–0.8 |
Anti-HBc, antibodies against core antigen of hepatitis B virus; HBsAg, surface antigen of hepatitis B virus; CI, confidence interval; N, total number of children tested
*
The likelihood of encountering acute infections in a cross- sectional survey conducted in a low prevalence setting is very low [21], therefore, anti-HBc-positive and HBsAg-positive cases found in the survey are considered chronic HBV infections
**
Crude estimate of CI (due to zero value of prevalence)