Fig. 2From: Seroprevalence of anti-HBc, risk factors of occupationally acquired HBV infection and HBV vaccination among hospital staff in Poland: a multicenter studyAnti-HBc prevalence among hospital staff by age and length of employment. Poland, 2016â2018, nâ=â306 (chi square for trend: *pâ<â0.01; **pâ<â0.01)Back to article page