COVID-19 vaccine effectiveness
(Randomized evidence)
Search studies
Trial | Type | Comparisons | Design | Participants | Sample size | Overall risk of bias Highest assessment |
Full description | |
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Intervention 1 | Intervention 2 | |||||||
ISRCTN69254139, EudraCT: 2020-005085-33 AstraZeneca+University of Oxford; Pfizer/BioNTech+Fosun Pharma Liu X, Lancet, 2021 () Com-COV Full text Commentary |
RNA based vaccine |
1 dose ChAdOx1/ 1 dose BNT162b2 1 dose BNT162b2 /1 dose ChAdOx1 |
2 doses ChAdOx1 2 doses BNT162b2 |
RCTPhase 2 | Adults 50 years or older with no previous SARS-CoV-2 infection, no or well-controlled mild-moderate comorbidities and HIV-negative in 8 centers in the UK | N=463 |
Some concerns Details |