1. P. Adepoju, As COVID-19 vaccines arrive in Africa, Omicron is reducing supply and increasing demand., Nature Medicine.
2. Tracking the uptake and trajectory of COVID-19 vaccination coverage in 15 West African countries: An interim analysis;Afolabi;BMJ global health,2021
3. Africa Centers for Disease Control and Prevention (CDC), Coronavirus disease 2019 (COVID-19), Africa CDC information.URL https://africacdc.org/{COVID-19}/.
4. Africa Centers for Disease Control and Prevention (CDC), COVID-19 vaccination – Africa CDC, Africa CDC information. URL https://africacdc.org/covid-19-vaccination/.
5. What policy makers need to know about COVID-19 protective immunity;Altmann;The Lancet,2020