Discipline in the obstetrics/gynecology ward is stricter than surgery services as the obstetrics/gynecology service had established and kept an updated record for all personnel and maintained the confidentiality of their records while ensuring that they are tested for HBsAg after any exposure and had received hepatitis B vaccination (and occasionally HBIG) when HBsAb titer was under 10 IU/dL. The gene discussed is PPIB; the disease is hepatitis A virus infection.