SARS-CoV-2(785) COVID-19(587) Infection(318) coronavirus(283) Vaccine(255) variant(217) SARS-COV-2 infection(216) virus(210) antibody(197) Patient(191) acute respiratory syndrome(186) caused(178) vaccination(168) pandemic(148) omicron(147) outbreak(146) respiratory(143) positive(136) effective(126) variants(126) the SARS-CoV-2(125) Protein(123) Transmission(122) neutralizing antibody(122) coronavirus disease(120) collected(116) SARS-CoV-2 variant(112) demonstrated(112) significantly(111) Treatment(111)