editorial素材 - Sofia, Bulgaria - 18 January, 2021: A vial of the Pfizer-BioNTech vaccine against COVID-19 is shown by a medical staff member at Aleksandrovska University Hospital.
Sofia, Bulgaria - 18 January, 2021: A vial of the Pfizer-BioNTech vaccine against COVID-19 is shown by a medical staff member at Aleksandrovska University Hospital.