pfizer, biontech, coronavirus, 2019-ncov, background, biological, bottle, care, clinic, clinical, corona virus, covid, covid-19, disease, doctor, dose, drug, epidemic, equipment, flu, genetic, health, illness, injection, intravenous, lab, laboratory, liquid, medical, medical supplies, medicine, pandemic, pharmacist, reaction, research, sars-cov-2, science, scientific, scientist, surgery, syringe, therapy, treatment, vaccination, vaccine, vial, virologist, virology, virus
