In this Thursday, March 18, 2021, file photo, Ugur Sahin, co-founder of the Mainz-based coronavirus vaccine developer BioNTech, listens during an Axel Springer Award ceremony. Europe can achieve "herd immunity" against the coronavirus within the next four months, the head of German pharmaceutical company BioNTech, which developed the first widely approved COVID-19 vaccine with U.S. partner Pfizer, said Wednesday. (Bernd von Jutrczenka/dpa via AP, Pool, file)
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