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2019ncov, 2022, africa, analysis, analyzing, blood, certification, contagious, corona, corona virus, coronavirus, covid, covid19, crisis, danger, delta, diagnisis, diagnostic, dirty concrete wall, disease, doctor, health, illness, immunity, infected, infection, medical, medicine, mutation, new, new strain, omicron, omicron variant, omicron virus, pathogen, sars, sarscov2, south, test, vaccination, vaccine, variant, virology, virus,