Advanced talks between the European Commission and Curevac AG have positioned the company to potentially supply up to 405 million doses of its investigational mRNA-based COVID-19 vaccine to the bloc. News of the progress, following similar EU-level talks with an alliance of Sanofi SA and Glaxosmithkline plc, Johnson & Johnson and Astrazeneca plc, sent Curevac's recently-listed U.S. shares (NASDAQ:CVAC) climbing 16% to $66 on Aug. 20.