The rollout of COVID-19 vaccines in Africa has been delayed due to supply bottlenecks and financial challenges. Between February and May, Africa received only 18.2 million of the 66 million expected doses through COVAX due to reduced supplies from the Serum Institute of India. While limited vaccine supplies are hampering large-scale rollout, funding for operational costs like transportation and storage is also a critical barrier. Most African countries only have financial plans to cover vaccinating the first 3% of their populations, but more funding will be needed for subsequent phases of vaccination programs. WHO is supporting countries to strengthen their COVID-19 costing plans to help unlock additional donor funding needed to fund vaccination programs.