KRT88P and infection: Immunity against HBV infection (anti-HBs+) was observed in 122 (26.1%) HCWs, consisting of 54 (11.6%) subjects with ‘vaccinated’ or ‘isolated-anti-HBs’ pattern (HBsAg-, anti-HBc-, anti-HBs +), and 68 (14.6%) subjects with ‘resolved-infection’ or ‘non-isolated anti-HBs’ pattern (HBsAg-, anti-HBc+, anti-HBs+).