1. WHO/AFRO. The yellow fever outbreak in Angola and Democratic Republic of the Congo ends (2017). http://www.who.int/csr/disease/yellowfev/en/.
2. WHO. Yellow Fever Fact Sheet (WHO, Geneva, Switzerland, 2016).
3. WHO. Yellow Fever Situation Report (WHO, Geneva, Switzerland, 2016).
4. Nigerian Centre for Disease Control (NCDC). Situation Report: Yellow Fever Outbreak in Nigeria (NCDC, Jabi Abuja, Nigeria, 2018).
5. WHO. Yellow Fever Strategic Response Plan (WHO, Geneva, Switzerland, 2016).