Pfizer and BioNTech SE said that the U.S. government has exercised its option for an additional 100 million doses of the Pfizer-BioNTech COVID-19 vaccine. This brings the total number of doses to be supplied by the companies to the U.S. government to 300 million.   “We support the new administration’s plan to vaccinate as many people as quickly as possible because there is an urgent need to help protect people from this virus, here in the U.S. and across the globe,” said Albert Bourla, cha...