1. World Health Organization. Immunization, Vaccines and Biologicals. (2019).
2. World Health Organization. Immunization Coverage. (2019).
3. Mihigo, R. et al. Challenges of immunization in the African region. Pan Afr. Med. J. 27(Suppl 3), 12 (2017).
4. Ethiopia, C. S. A. Mini Ethiopian Demographic Health Survey. (Addis Ababa, 2019).
5. Addis Declaration on Immunization. Accessed 2020.