bottle, tube, vaccine, syringe, doctor, Scientist, omicron, test, virus, covid, delta, kit, 19, africa, alpha, america, analyze, analyzing, antibody, antigen, atk, b.1.1.529, beta, blood, brazilian, care, cluster, coronavirus, covid-19, exam, genotype, health, hybrid, india, indian, laboratory, medical, mu, mutation, neutralizing, nu, plus, positive, rt-pcr, sample, south, strain, swab, thailand, type, uk, usa, variant