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We conducted a cross-sectional study to evaluate the prevalence rate and risk factors for hepatitis B virus (HBV) infection among residents and staff at the Fatebenefratelli Institute in San Colombano in the province of Milan. We tested serum from 510 patients and 165 staff members. In addition, a medical record and a completed questionnaire were obtained from each patient. A total of 338 (66.5%)...
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