A medical worker prepares a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)

A woman receives a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)

A man receives a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)

A woman receives a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)

A man receives a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)

A medical worker prepares a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)

A medical worker receives a dose of Chinese Sinopharm COVID-19 vaccine in Rabat, Morocco, Jan. 29, 2021. Morocco launched a nationwide COVID-19 vaccination campaign on Thursday, a day after receiving the first batch of Chinese vaccines. (Photo by Chadi/Xinhua)