High-school boys wait to receive a dose of Pfizer-Biontech Comirnaty COVID-19 vaccination, at Phan Huy Chu high school in Hanoi, Vietnam, 23 November 2021. Hanoi started to vaccinate for youth aged 15 to 17 against COVID-19 from 23 November. (Photo by Luong Thai Linh/EPA/EFE)
