Afghanistan continues to face low routine immunization coverage, particularly among zero-dose and under-immunized children in polio high-risk districts. Nangarhar remain vulnerable due to population mobility, misinformation, weak follow-up of defaulters, and limited community-facility linkages. This project leverages Community Health Workers (CHWs) and Community Health Supervisors (CHSs) under the CBHC framework to increase routine immunization uptake, reduce zero-dose children, and strengthen maternal, child health, nutrition, WASH, and birth registration services in alignment with MoPH, Polio Emergency Plan, and UNICEF strategies. The field supervisor will provide regular supportive supervision, mentoring, and performance monitoring of CHS and CHWs to ensure effective community engagement, support outreach sessions, accurate tracking of zero-dose and defaulter children, and timely referral and follow-up of RI, MCH and nutrition cases.