1. World Health Organization (WHO). Global Tuberculosis Report 2021. Available from: https://www.who.int/publications/i/item/9789240037021.
2. Natural history of tuberculosis: duration and fatality of untreated pulmonary tuberculosis in HIV negative patients: a systematic review;Tiemersma;PLoS One,2011
3. Global Tuberculosis Report,2016
4. Global Tuberculosis Report. Global Tuberculosis Control,2014
5. Federal Ministry of Health Nigeria. First national TB prevalence survey 2012, Nigeria. Available at https://www.who.int/tb/publications/NigeriaReport_WEB_NEW.pdf Accessed on 22.June.2021.