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the claim
Pfizer, Moderna, AstraZeneca, and Johnson & Johnson COVID-19 vaccines have varying efficacy rates
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
5 sources for · 0 against

Multiple systematic reviews and meta-analyses in the literature evaluate and compare the clinical efficacy rates of COVID-19 vaccines produced by Pfizer, Moderna, AstraZeneca, and Johnson & Johnson.

Evidence for · 5
link.springer.com: Efficacy of approved vaccines to prevent COVID-19: a systematic review and network meta-analysis of reconstructed individual patient data from randomized trials
cited by 0
Focuses on systematic reviews and meta-analyses to evaluate and compare vaccine efficacy (VE) across trials.
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The analysis

Judged against statistical and reference sources.

More for · 4
nature.com: Comparing the clinical efficacy of COVID-19 vaccines: a systematic review and network meta-analysis | Scientific Reports
cited by 0
Performs network meta-analyses to compare the clinical efficacy of different COVID-19 vaccines.
frontiersin.org: Vaccine efficacy against SARS-CoV-2 for Pfizer BioNTech, Moderna, and AstraZeneca vaccines: a systematic review
cited by 0
Provides a systematic review specifically evaluating vaccine efficacy for Pfizer-BioNTech, Moderna, and AstraZeneca.
link.springer.com: The efficacy and effectiveness of COVID-19 vaccines around the world: a mini-review and meta-analysis | Annals of Clinical Microbiology and Antimicrobials | Springer Nature Link
cited by 0
Evaluates the efficacy and effectiveness of multiple vaccines including AstraZeneca, Pfizer, Moderna, and Johnson & Johnson.
sciencedirect.com: Comparative effectiveness of three common SARS-COV-2 vaccines: A network meta-analysis of randomized trials - ScienceDirect
cited by 0
Discusses network meta-analyses comparing the effectiveness of multiple common SARS-COV-2 vaccines.
The paper trail · every fact has a biography
first checked31 Jul 2026
judged → SUPPORTED · 7531 Jul 2026
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