
A medical personnel receives a shot of the COVID-19 vaccine at a hospital in Bucharest, Romania, Dec. 27, 2020. (Photo by Gabriel Petrescu/Xinhua)

A medical personnel receives a shot of the COVID-19 vaccine at a hospital in Bucharest, Romania, Dec. 27, 2020. (Photo by Cristian Cristel/Xinhua)

A medical personnel receives a shot of the COVID-19 vaccine at a hospital in Bucharest, Romania, Dec. 27, 2020. (Photo by Cristian Cristel/Xinhua)