Abstract
The aim of this study is to evaluate hepatitis B vaccine protection in those adults who have taken one or two does of vaccine before. It was a retrospective cross sectional study was conducted on fifty-six military personnel in Tehran, Iran in the spring 2007. Demographic data such as age, marital status, education level, number of vaccine doses injected and, type of vaccine and date of last vaccination was collected. Their serum was tested for HBs Ab, HBc Ab and HBs Ag and finally the results were analyzed by SPSS software. All individuals were male with the mean age of 33.9+/-8.9 years. Twelve individuals who had only received one dose of injected vaccine had no antibody against HBsAg and no protection against hepatitis B virus. Of forty-four individuals that had received two doses of injected vaccine, 27 persons (61.4%) were protected and had serum HBsAb more than 10 MIU mL(-1). In conclusion one dose of HBV vaccine cannot produce immunity for five years but two doses of HBV vaccine can produce immunity for five years. However, HBsAb should be tested to make sure of immunity.
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