History and Objectives: Considering the goal of WHO to eradicate the polio viruses type I, II and III and it is also executed by our health authorities, it is very important to immunize well the children. Therefore, this study was carried out to determine the degree of immunization following Polio vaccination in children at an age range of 7-10 years in Ahwaz.

Materials and Methods: The descriptive strategy of this study was performed on 324 samples of serum. At first, the polio viruses type I, II and III were cultured in Hela Medium and then the viruses were isolated by ultracentrifuge (40000 RPM) for one h. for determination of antibody titer of polio viruses, the ELISA method was used for which 30?g of related antigen was added. The immunization rate was determined in samples and then it was extrapolated to society.

Results: The study was performed on 324 cases consisting of male and female ones in equal ratio at an age of 8.4±3 years. It was found out that 281 cases (86.7%) had antibodies against viruses type I, II and III. Furthermore, there was no significant difference among groups with different degrees of immunization.

Conclusion: A high level of immunization was observed in immunized children. Therefore, it is recommended to perform similar studies in other sects of society including rural areas.