The document outlines barriers to childhood immunization and social and behavioral change communication (SBCC) interventions. Key barriers include lack of access to immunization services for children in remote, conflict-affected, or marginalized areas; lack of awareness and trust in vaccine safety among parents; and gender norms that restrict women's mobility and decision-making power. Effective SBCC interventions to address these barriers include mass awareness campaigns, parent education, community mobilization, home visits, follow-up with mothers, and ensuring access to vaccination services. A multisectoral approach is needed to strengthen immunization programs and overcome challenges like gender barriers.