COVID-19(391) Result(305) SARS-CoV-2(247) supplementary material(212) age(151) Patient(126) vaccination(121) Infection(113) risk(113) pandemic(111) Vaccine(104) death(103) conducted(103) individual(102) COVID-19 pandemic(97) Transmission(89) Evidence(89) hospital(87) 95% CI(86) SARS-COV-2 infection(85) coronavirus disease(79) reduce(78) outbreak(76) reduced(76) Health(75) Intervention(73) effective(73) country(71) public health(70) Analysis(70)