COVID-19(574) SARS-CoV-2(532) coronavirus(298) acute respiratory syndrome(276) Patient(255) coronavirus disease(230) objective(172) Infection(171) Coronavirus disease 2019(152) Result(147) 95% CI(142) vaccination(141) Vaccine(139) Treatment(133) antibody(131) acute respiratory syndrome coronavirus(131) participant(127) evaluated(126) SARS-COV-2 infection(124) acute respiratory syndrome coronavirus 2(120) age(120) individual(119) outcome(112) median(111) severe acute respiratory syndrome Coronavirus(109) dose(109) risk(106) variant(100) Evidence(100) conducted(99)