Fig. 2
From: Seroepidemiology of HBV infection among health-care workers in South Sulawesi, Indonesia
The prevalence of HBsAg, anti-HBc, and anti-HBs according to the age groups (< 20, 20–29.9, 30–39.9, and ≥ 40 years) among 467 health-care workers (HCWs). Linear-by-linear association test showed significant increasing trends of anti-HBc (p < 0.001) and non-isolated anti-HBs (P = 0.004). No significant difference was found in the prevalence of vaccinated-anti-HBs among the three groups