Author/Authors :
Rezaee، Reza نويسنده Kurdistan Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran , , Aghcheli، Bahman نويسنده Hepatitis B Molecular Laboratory, Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, IR Iran Aghcheli, Bahman , Poortahmasebi، Vahdat نويسنده Hepatitis B Molecular Laboratory, Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, IR Iran , , Qorbani، Mostafa نويسنده Department of Endocrinology, Endocrinology and Metabolism Research Center, , , Alavian، Seyed-Moayed نويسنده , , Jazayeri، Seyed Mohammad نويسنده Hepatitis B Molecular Laboratory-Department of Virology-School of Public Health-Tehran University of Medical Sciences, Tehran ,
Abstract :
Hepatitis B Virus expanded program on immunization (EPI) started on 1993 in Iran. Most surveys have assessed the level of response to vaccine by measuring the titers of anti-HBs. This meta- analysis aimed to summarize the Iranian published data on the rate of vaccine-responders versus non-responders. Moreover, the impact of variables such as age, gender, type of vaccine, etc. on the levels of responsiveness was evaluated. All published papers on this topic in Iranian and international journals with affiliation of “Iran” were reviewed using standard keywords up to 2014. We included our study to healthy participants with no previous HBV infection and who had already received a complete course of HB vaccine. The estimated prevalence and 95% confidence intervals in 28 eligible articles for HBV vaccine responders (anti-HBs > 10 IU/mL) and non-responders (10 <) were analyzed by random effect method due to between-study heterogeneity. The age of subjects was between 6 months and 15 years old. Overall, 5991 (51.5%) were male and 4571 (48.5%) females. Overall, 80% were responders to vaccine versus 20% nonresponders. With increase in age, the number of responders to vaccine decreased significantly (P = 0.001). There was no strong difference between responders versus nonresponders to vaccine for gender, types of vaccine, ethnicity and living area. The results arose from this meta-analysis highlighted the safety of vaccine and its effectiveness in stimulating immune response of vaccines, despite being different in generation, manufacturers and types. Moreover, there was no substantial difference between Iranian and other international investigations in the rate of nonresponsiveness to HBV vaccine.
