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2019ncov, analysis, analyzing, blood, certification, china, contagious, corona, corona virus, coronavirus, covid, covid19, crisis, danger, danger virus, death, delta, diagnisis, diagnostic, disease, doctor, health, illnes, illness, immunity, infected, infection, lungs, medical, medicine, mutation, new strain, omicron, omicron virus, pathogen, sars, sarscov2, test, vaccination, vaccine, variant, virology, virus,