This file photo taken on November 6, 2020 shows mink looking out from their cage at the farm of Henrik Nordgaard Hansen and Ann-Mona Kulsoe Larsen as they have to kill off their herd, which consists of 3000 mother mink and their cubs on their farm near Naestved, Denmark. - A mutated version of the new coronavirus detected in Danish minks that raised concerns about the effectiveness of a future vaccine has likely been eradicated, Denmark's health ministry said Thursday, November 19, 2020.