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Ugur Sahin, Turkish co-founder of German biotechnology company BioNTech poses for a picture in Mainz, western Germany, on November 27, 2019. - Progress on a Covid-19 vaccine has propelled the modest husband-and-wife team behind German firm BioNTech into the global limelight, with attention inevitably focussing on their background as the children of Turkish immigrants. Ugur Sahin and his wife Ozlem Tureci founded BioNTech in the western German city of Mainz in 2008, and together with US giant Pfizer are developing the leading candidate in the worldwide chase for a vaccine. (Photo by Andreas Arnold / dpa / AFP) / Germany OUT (KEYSTONE/AFP / dpa/ANDREAS ARNOLD)