A teenager receives a dose of the COVID-19 vaccine in Sale, Morocco, on Sept. 21, 2021. Morocco has begun vaccinating teenagers aged between 12 and 17 years old against COVID-19. (Photo by Chadi/Xinhua)
A teenager receives a dose of the COVID-19 vaccine in Sale, Morocco, on Sept. 21, 2021. Morocco has begun vaccinating teenagers aged between 12 and 17 years old against COVID-19. (Photo by Chadi/Xinhua)
A teenager receives a dose of the COVID-19 vaccine in Sale, Morocco, on Sept. 21, 2021. Morocco has begun vaccinating teenagers aged between 12 and 17 years old against COVID-19. (Photo by Chadi/Xinhua)
A teenager receives a dose of the COVID-19 vaccine in Sale, Morocco, on Sept. 21, 2021. Morocco has begun vaccinating teenagers aged between 12 and 17 years old against COVID-19. (Photo by Chadi/Xinhua)
A teenager receives a dose of the COVID-19 vaccine in Sale, Morocco, on Sept. 21, 2021. Morocco has begun vaccinating teenagers aged between 12 and 17 years old against COVID-19. (Photo by Chadi/Xinhua)