The US government has ordered Pfizer Inc and German biotech firm BioNTech SE to to produce and deliver 100 million doses of their COVID-19 vaccine candidate for $1.95 billion. Pfizer will deliver the doses if the covid vaccine receives emergency use authorization or licensure from the U.S. Food and Drug Administration, after completing demonstration of safety and efficacy in a large Phase 3 clinical trial. The vaccine being developed by Pfizer and BioNTech has shown promise in early-stage small studies in humans.