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2019ncov, antibiotic, astrazeneca, background, biontech, blue, bottle, care, closeup, concept, copy space, coronavirus, covid, covid19, disease, dose, drug, epidemic, health, hospital, hypodermic, illness, injection, isolated, johnson, laboratory, medical, medication, medicine, moderna, mrna, mutation, needle, novavax, pandemic, pfizer, pharmacology, regeneron, research, serum, sinovac, strain, syringe, therapy, treatment, trial, vaccination, vaccine, vial, virus,