SARS-CoV-2(204) COVID-19(159) participant(128) 95% CI(116) Vaccine(112) vaccination(107) dose(98) reported(97) age(95) Registered(94) Trial(89) COVID-19 vaccine(88) Randomly(87) assigned(84) enrolled(83) SARS-COV-2 infection(82) Infection(80) individual(79) randomised(78) Analysis(76) receive(74) finding(72) funding(72) variant(69) hospital(67) Safety(64) outcome(62) were excluded(61) Effectiveness(60) double-blind(59)