MARBURG, GERMANY - MARCH 29: Employees in special suits test the procedures for the manufacturing of the messenger RNA (mRNA) for the Covid-19 vaccine in German company BioNTech, in Marburg, Germany on March 29, 2021. BioNTech Marburg's coronavirus vaccine production target will be 2.5 billion doses for 2021, up from 2.3 billion as it is considered as one of the largest manufacturing facilities producing mRNA vaccines in the world. The Pfizer-BioNTech vaccine was developed by Ozlem Tureci and Ugur Sahin, a couple who are children of Turkish immigrants in Germany. (Photo by Abdulhamid Hosbas/Anadolu Agency via Getty Images)