A medical worker administers a dose of COVID-19 vaccine in Marrakech, Morocco, on April 30, 2021. Morocco's total COVID-19 tally rose to 511,249 on Friday as 363 new cases were registered during the past 24 hours. Meanwhile, 5,054,642 people have received so far the first vaccine shot against COVID-19 in the country, and 4,260,412 people the second dose. (Photo by Chadi/Xinhua)

A medical worker administers a dose of COVID-19 vaccine in Marrakech, Morocco, on April 30, 2021. Morocco's total COVID-19 tally rose to 511,249 on Friday as 363 new cases were registered during the past 24 hours. Meanwhile, 5,054,642 people have received so far the first vaccine shot against COVID-19 in the country, and 4,260,412 people the second dose. (Photo by Chadi/Xinhua)

A medical worker administers a dose of COVID-19 vaccine in Marrakech, Morocco, on April 30, 2021. Morocco's total COVID-19 tally rose to 511,249 on Friday as 363 new cases were registered during the past 24 hours. Meanwhile, 5,054,642 people have received so far the first vaccine shot against COVID-19 in the country, and 4,260,412 people the second dose. (Photo by Chadi/Xinhua)