This document summarizes the program structure and strategies for supplementary immunization activities in India to eradicate polio. It describes: 1) The administrative structure of the immunization program from the minister down to vaccinators and supervisors at the district level. 2) Key eradication strategies including two nationwide immunization rounds called National Immunization Days and monthly sub-national rounds in high-risk states. 3) Implementation of National Immunization Days involves immunizing 172 million children across 209 million households using 2.3 million vaccinators and 155,000 supervisors deployed.