It is places like this where the fate of many people is decided. A four-story new building in Mainz-Oberstadt, the windows protected with blinds, the address almost prophetic: At the Goldgrube 12. While work in many places in Europe is stopped, work is done behind these windows on all floors. And more than usual, seven days a week. At the headquarters of the drug developer Biontech, the researchers are looking for a vaccine against Sars-CoV-2.