COVID-19 vaccination reduces transmission of SARS-CoV-2 from infected individuals.

the verdict

INSUFFICIENT LEANING

Recorded sources

6 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that COVID-19 vaccination reduces transmission of SARS-CoV-2 from infected individuals?

Unclear. Several household and modeling studies from individual countries report that COVID-19 vaccination was associated with reduced transmission or infectivity of SARS-CoV-2, including a 2024 US household cohort and an Israeli household study. Each covers only one setting, variant wave, or period, so the evidence supports the claim in part rather than settling it generally.

Verdict: PARTIAL LEAN · 6 sources for, 0 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 6

Recent COVID-19 Vaccination and Risk of SARS-CoV-2 Transmission.

2026

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SC, B., SE, S., HK, T., Y, Z., JE, S., TA, S., MS, S., SH, M., ED, S., CY, V., A, V. d. R., HY, C., JA, E., E, C., MP, M., AS, L., EI, O., JB, B., CG, G., & HL, K. (2026). Recent COVID-19 Vaccination and Risk of SARS-CoV-2 Transmission.. doi.org. https://doi.org/10.1001/jamanetworkopen.2026.12609

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More for · 5

COVID-19 Vaccines and SARS-CoV-2 Transmission in the Era of New Variants: A Review and Perspective -

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COVID-19 Vaccines and SARS-CoV-2 Transmission in the Era of New Variants: A Review and Perspective - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1093/ofid/ofac124

Effect of COVID-19 vaccination on household transmission of SARS-CoV-2 in the Omicron era: The Vaccine Effectiveness, Networking, and Universal Safety (VENUS) study

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Effect of COVID-19 vaccination on household transmission of SARS-CoV-2 in the Omicron era: The Vaccine Effectiveness, Networking, and Universal Safety (VENUS) study. (n.d.). cir.nii.ac.jp. https://doi.org/10.1016/j.ijid.2023.06.017

SIRVVD model-based verification of the effect of first and second doses of COVID-19/SARS-CoV-2 vaccination in Japan

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SIRVVD model-based verification of the effect of first and second doses of COVID-19/SARS-CoV-2 vaccination in Japan. (n.d.). cir.nii.ac.jp. https://doi.org/10.3934/mbe.2022047

Vaccines for COVID-19: A Systematic Review of Immunogenicity, Current Development, and Future Prospects

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Vaccines for COVID-19: A Systematic Review of Immunogenicity, Current Development, and Future Prospects. (n.d.). cir.nii.ac.jp. https://doi.org/10.3389/fimmu.2022.843928

Impact of BNT162b2 Vaccination and Isolation on SARS-CoV-2 Transmission in Israeli Households: An Observational Study

2022

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Impact of BNT162b2 Vaccination and Isolation on SARS-CoV-2 Transmission in Israeli Households: An Observational Study. (2022). hal.science. https://doi.org/10.1093/aje/kwac042

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