The purpose of this assignment is to estimate the health, social, educational, and economic costs of inaction in reaching zero-dose and under-vaccinated children from Kosovo. These costs should then be compared with the budgetary requirements for improving immunization programme over the next five years. The analysis should also identify key budgeting challenges and provide recommendations for potential solutions to ensure the financial sustainability of the immunization program. Bidders are expected to submit to UNICEF before 22 January at 15:00 (CET) via email to: [email protected].