1. Simply put: Vaccination saves lives;Orenstein;Proc Natl Acad Sci USA,2017
2. WHO, Vaccines and immunization; 2020, available at https://www.who.int/health-topics/vaccines-and-immunization#tab=tab_1.
3. Return on investment from childhood immunization in low-and middle-income countries, 2011–20;Ozawa;Health Aff,2016
4. National Population Commission - NPC/Nigeria and ICF. 2019. Nigeria Demographic and Health Survey 2018. Abuja, Nigeria, and Rockville, Maryland, USA: NPC and ICF.
5. World Health Organization. Ten threats to global health in 2019. Available at https://www.who.int/news-room/spotlight/ten-threats-to-global-health-in-2019 (accessed on February 15, 2023).