analysis, analyzing, antibiotic, contagious, coronavirus, coronavirus omicron, covid omicron, covid strain, covid-19, delta, drugs, epidemiology, immunity, immunization, infected, infection, infectious, laboratory, medication, mutation, new, new covid, omicron vaccination, omicron vaccine, reinfection, research, researcher, sars-cov-2, strain, transmission, update, vaccinating, vaccination, vaccine, variant, vial, virology, virus