Pfizer-BioNTechs COVID-19 vaccine becomes first to get WHO nod for emergency use January 1st, 2021 Pfizer-BioNTechs COVID-19 vaccine becomes first to get WHO nod for emergency use January 1, 2021Technology Pfizer-BioNTechs COVID-19 vaccine becomes first to get WHO nod for emergency use January 1st, 2021