1. National Primary Healthcare Development Agency and National Bureau of Statistics. Nigeria. National immunization coverage survey 2016/17, final report. Abuja, Nigeria: National Primary Healthcare Development Agency and National Bureau of Statistics; 2017. p. 138. www.nigerianstat.gov.ng/pdfuploads/MICS-%202016-17%20National.pdf.
2. World Health Organization. State of the world’s vaccines and immunization. 3rd edition. Geneva: World Health Organization; 2009. https://apps.who.int/iris/handle/10665/44169.
3. Seroprevalence of hepatitis B infection in Nigeria: a national survey;Am J Trop Med Hyg,2016
4. Prevalence of hepatitis B virus infection in Nigeria, 2000–2013: a systematic review and meta-analysis;Niger J Clin Prac,2015
5. World Health Organization (WHO). Global tuberculosis report 2020. Geneva: World Health Organization; 2020. License: Acessed June 26, 2021. https://apps.who.int/iris/bitstream/handle/10665/336069/9789240013131-eng.pdf.