My son is 2 yrs old. We gave following polio vaccine. OPV 0 - At birth IPV 1- 6 week IPV 2 -10 week IPV 3 - 14 week IPV-B1 - 18 Months As per Vaccine chart, IPV-B2 is planned at the age of 4-6 years. Government is giving OPV to child below 5 years age as a part of Polio vaccination program. They came to home to give Polio vaccine to my son(2 years old). Do we need to give OPV to my son(2 yrs) OR It is not required for my son? Please suggest.