DESSAU, GERMANY - NOVEMBER 23: An employee holds an ampoule into which the vaccine is later filled as German Health Minister Jens Spahn tours the lab facilities of vaccine maker IDT Biologika during the second wave of the coronavirus pandemic on November 23, 2020 in Dessau, Germany. IDT Biologika is currently conducting human trials for its potential vaccine against Covid-19. During the company visit, Spahn announced the planned purchase at least five million vaccine doses. (Photo by Hendrik Schmidt-Pool/Getty Images)