1. Ginglen, J.G. and Doyle, M.Q. (2022) Immunization. StatPearls Publishing, Treasure Island. http://www.ncbi.nlm.nih.gov/books/NBK459331/
2. World Health Organization. Vaccines and Vaccination.
https://www.who.int/en/health-topics/vaccines-and-immunization
3. World Health Organization (2022) Immunization Coverage.
https://www.who.int/en/news-room/fact-sheets/detail/immunization-coverage
4. Routine Vaccination Coverage — Worldwide, 2021
5. National Institute of Statistics and Economic Analysis (2019) Demographic and Health Survey V. Cotonou-Benin.
https://www.dhsprogram.com/pubs/pdf/FR350/FR350.pdf