The U.S. government will pay $1.95 billion to Pfizer Inc. and Biontech SE for the first 100 million doses of their jointly developed mRNA-based COVID-19 vaccine once Pfizer manufactures it and receives the FDA’s approval or emergency use authorization. The two companies agreed, as part of Operation Warp Speed, to begin delivering 300 million doses of a COVID-19 vaccine in 2021.