Enlarge / A pharmacist holding a vial of the undiluted Pfizer-BioNTech vaccine for COVID-19. (credit: Getty | JEAN-FRANCOIS MONIER) The US Food and Drug Administration on Wednesday announced a big change in the way doses of Pfizer-BioNTech’s COVID-19 vaccine can be handled. From now on, undiluted vials of the mRNA vaccine can stay at normal […]
