This photograph released by UNICEF on Wednesday Feb. 24, 2021 shows the first shipment of COVID-19 vaccines distributed by the COVAX Facility arriving at the Kotoka International Airport in Accra, Ghana. Ghana has become the first country in the world to receive vaccines acquired through the United Nations-backed COVAX initiative with a delivery of 600,000 doses of the AstraZeneca vaccine made by the Serum Institute of India. (Francis Kokoroko/UNICEF via AP)

This photograph released by UNICEF Wednesday Feb. 24, 2021 shows the first shipment of COVID-19 vaccines distributed by the COVAX Facility arriving at the Kotoka International Airport in Accra, Ghana. Ghana has become the first country in the world to receive vaccines acquired through the United Nations-backed COVAX initiative with a delivery of 600,000 doses of the AstraZeneca vaccine made by the Serum Institute of India. (Francis Kokoroko/UNICEF via AP)

This photograph released by UNICEF Wednesday Feb. 24, 2021, shows the first shipment of COVID-19 vaccines distributed by the COVAX Facility arriving at the Kotoka International Airport in Accra, Ghana. Ghana has become the first country in the world to receive vaccines acquired through the United Nations-backed COVAX initiative with a delivery of 600,000 doses of the AstraZeneca vaccine made by the Serum Institute of India. (Francis Kokoroko/UNICEF via AP)

This photograph released by UNICEF Wednesday Feb. 24, 2021 shows the first shipment of COVID-19 vaccines distributed by the COVAX Facility arriving at the Kotoka International Airport in Accra, Ghana. Ghana has become the first country in the world to receive vaccines acquired through the United Nations-backed COVAX initiative with a delivery of 600,000 doses of the AstraZeneca vaccine made by the Serum Institute of India. (Francis Kokoroko/UNICEF via AP)