Sanofi, GSK, racing to catch up, begin their first human study of coronavirus vaccine

Though Sanofi and GSK have been slower to begin human studies than Moderna, Pfizer and other developers, the two are using a more established vaccine technology that they argue could deliver a more potent shot. The U.S. government has promised up to $2.1 billion in funding for the program, a sum second only to what's been pledged to Moderna.