WSJ : Covid-19 Vaccine From Pfizer and BioNTech Works Better Than Expected Covid-19 Vaccine From Pfizer and BioNTech Works Better Than ExpectedThe drugmakers could ask FDA to permit wide use of vaccine for the new coronavirus by end of November if proven safe in study subjects Download Covid-19_Vaccine_From_Pfizer_and_BioNTech_Works_Better_Than_Expected_-_WSJ.pdf