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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
Recorded sources
5 sources for · 0 against
Is it true that Pfizer, Moderna, AstraZeneca, and Johnson & Johnson COVID-19 vaccines have varying efficacy rates?
Yes. 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.
Verdict: SUPPORTED · 5 sources for, 0 against · Last checked
The analysis
Judged against statistical and reference sources.
Evidence for · 5
Focuses on systematic reviews and meta-analyses to evaluate and compare vaccine efficacy (VE) across trials.
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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. (n.d.). link.springer.com. https://link.springer.com/article/10.1007/s10389-022-01707-1
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More for · 4
Performs network meta-analyses to compare the clinical efficacy of different COVID-19 vaccines.
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nature.com: Comparing the clinical efficacy of COVID-19 vaccines: a systematic review and network meta-analysis | Scientific Reports. (n.d.). nature.com. https://www.nature.com/articles/s41598-021-02321-z
Provides a systematic review specifically evaluating vaccine efficacy for Pfizer-BioNTech, Moderna, and AstraZeneca.
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frontiersin.org: Vaccine efficacy against SARS-CoV-2 for Pfizer BioNTech, Moderna, and AstraZeneca vaccines: a systematic review. (n.d.). frontiersin.org. https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2023.1229716/pdf
Evaluates the efficacy and effectiveness of multiple vaccines including AstraZeneca, Pfizer, Moderna, and Johnson & Johnson.
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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. (n.d.). link.springer.com. https://link.springer.com/article/10.1186/s12941-023-00594-y
Discusses network meta-analyses comparing the effectiveness of multiple common SARS-COV-2 vaccines.
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sciencedirect.com: Comparative effectiveness of three common SARS-COV-2 vaccines: A network meta-analysis of randomized trials - ScienceDirect. (n.d.). sciencedirect.com. https://www.sciencedirect.com/science/article/abs/pii/S1138359324001539
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What does the evidence say?
Judged against statistical and reference sources.
Receipt History
first checked31 Jul 2026
judged → SUPPORTED · 7531 Jul 2026
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