A registration sign for the vaccination against COVID-19 is seen at the entrance of the University hospital of Essen in Essen, Germany, Jan. 18, 2021. Since the start of the COVID-19 vaccination program in Germany at the end of December, more than 961,600 people have received a COVID-19 jab, the Robert Koch Institute (RKI) announced on Jan. 15, 2021. (Photo by Tang Ying/Xinhua)
A medical worker (L) receives a COVID-19 vaccine at the University hospital of Essen in Essen, Germany, Jan. 18, 2021. Since the start of the COVID-19 vaccination program in Germany at the end of December, more than 961,600 people have received a COVID-19 jab, the Robert Koch Institute (RKI) announced on Jan. 15, 2021. (Photo by Tang Ying/Xinhua)
A medical worker (L) receives a COVID-19 vaccine at the University hospital of Essen in Essen, Germany, Jan. 18, 2021. Since the start of the COVID-19 vaccination program in Germany at the end of December, more than 961,600 people have received a COVID-19 jab, the Robert Koch Institute (RKI) announced on Jan. 15, 2021. (Photo by Tang Ying/Xinhua)