Pictured is a patient at another blood donation centre for this particular study. Credit: Genomics England Scientists involved in a Covid-19 genetic research study have issued an urgent call to Londoners who caught the virus to donate blood at special pop-up centres opening across the capital. From this Saturday (April 24), the city’s first temporary centres, including on the Barnet/Enfield border, will open their doors to volunteers. The unique GenOMICC Covid-19 study analyses the genes of people who have had the virus to discover why some experienced no symptoms while others became extremely ill. The study is already contributing to the fight again Covid, with preliminary results helping identify possible new treatments.