Credit: CC0 Public Domain

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 .

The announcement on Monday that their vaccine was more than 90 percent effective in trials led news bulletins around the world and sent stock markets and hopes