This Guidebook on Immunization has been thoroughly edited and updated by the current team of the Advisory Committee on Vaccines and Immunization Practices (ACVIP) while preserving the foundational structure established by earlier editions developed by leading experts in vaccinology across India. Based on extensive medical literature review and local epidemiological data, the guidebook is designed to promote uniform, evidence-based, and appropriate vaccination practices among members of the Indian Academy of Pediatrics (IAP). Key Features Updated and revised by the current ACVIP team with continuity from earlier expert-developed editions Evidence-based recommendations derived from medical literature and local epidemiological data Focus on standardizing vaccination practices among IAP members Scientifically grounded vaccine schedules tailored to practical and real-world considerations Recognition of differences between IAP-recommended schedules and government programs due to availability and implementation factors Clear guidance to support informed clinical decision-making in pediatric immunization practice