COVID-19(1457) SARS-CoV-2(1020) Patient(564) Infection(297) coronavirus(277) positive(245) SARS-COV-2 infection(244) acute respiratory syndrome(241) coronavirus disease(208) Result(207) pandemic(205) Treatment(203) antibody(203) SARS-CoV-2.(194) Analysis(185) conducted(180) age(179) reported(178) Vaccine(169) collected(166) vaccination(164) patients with COVID-19(163) variant(159) acute respiratory syndrome coronavirus(157) risk(156) tested(156) 95% CI(155) evaluated(155) severe acute respiratory syndrome Coronavirus(150) with COVID-19(147)