Workers upload a batch of China's Sinopharm COVID-19 vaccines onto a truck in Cairo International Airport, Egypt, Feb. 23, 2021. The shipment of COVID-19 vaccines from Chinese company Sinopharm arrived in Egyptian capital Cairo on Tuesday. (Xinhua/Wu Huiwo)

Workers upload a batch of China's Sinopharm COVID-19 vaccines onto a truck in Cairo International Airport, Egypt, Feb. 23, 2021. The shipment of COVID-19 vaccines from Chinese company Sinopharm arrived in Egyptian capital Cairo on Tuesday. (Xinhua/Wu Huiwo)

Workers upload a batch of China's Sinopharm COVID-19 vaccines onto a truck in Cairo International Airport, Egypt, Feb. 23, 2021. The shipment of COVID-19 vaccines from Chinese company Sinopharm arrived in Egyptian capital Cairo on Tuesday. (Xinhua/Wu Huiwo)

Workers transport a batch of China's Sinopharm COVID-19 vaccines in Cairo International Airport, Egypt, Feb. 23, 2021. The shipment of COVID-19 vaccines from Chinese company Sinopharm arrived in Egyptian capital Cairo on Tuesday. (Xinhua/Wu Huiwo)

Workers upload a batch of China's Sinopharm COVID-19 vaccines onto a truck in Cairo International Airport, Egypt, Feb. 23, 2021. The shipment of COVID-19 vaccines from Chinese company Sinopharm arrived in Egyptian capital Cairo on Tuesday. (Xinhua/Wu Huiwo)