HBAgpositive specimens , or when there is potential exposure to blood (blood drawing ) or to patients ' secretions . Eating and smoking are prohibited in the laboratory and in other areas exposed to secretions , blood , or blood products . Patient education regarding the nature of the disease , its infectiousness , and prognosis is a critical factor in preventing transmission and protecting contacts . D . Active Immunization : Hepatitis B Vaccine Active immunization is recommended for individuals at high risk for hepatitis B (eg , health care personnel and...











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