Health authorities have identified at least five strains of the coronavirus in the region.
Africa CDC boss says the continent is slipping into the third wave, with deadlier variants emerging.
The US President said donation would “supercharge the battle against the virus”.
The 10-month programme to focus on three impact areas of agri-finance, horticulture and aquaculture.
The death toll from the pandemic stood at 131,441 on June 3, 2021.