Reducing immunization inequities among zero-dose and under-vaccinated children through catch-up vaccination in Burkina Faso: findings from a mixed-method evaluation of the Big Catch-Up initiative, 2023–2025
A mixed-methods evaluation of Burkina Faso's 2023–2025 Big Catch-Up initiative demonstrates that integrating catch-up vaccination with primary health care services and community engagement successfully reached over 340,000 zero-dose and under-vaccinated children while strengthening routine immunization, despite persistent challenges posed by insecurity and logistical constraints.