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the claim

Prior SARS-CoV-2 infection gives lasting but incomplete protection against reinfection.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
6 sources for · 1 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 prior SARS-CoV-2 infection gives lasting but incomplete protection against reinfection?

Yes. A systematic review and a large national study report that prior SARS-CoV-2 infection gives strong but incomplete protection against reinfection, lasting roughly 10 months to over a year, though Omicron-era data show reinfection became relatively common.

Verdict: SUPPORTED · 6 sources for, 1 against · Last checked

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

Evidence for · 6
Infection
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Infection. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Infection

Evidence against · 1
Patterns of Reported Infection and Reinfection of SARS-CoV-2 in England
2022
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Keeling, M. J. (2022). Patterns of Reported Infection and Reinfection of SARS-CoV-2 in England. doi.org. https://doi.org/10.1101/2022.06.13.22276316

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More for · 5
Correlates of protection against SARS-CoV-2 infection and COVID-19 disease.
2022
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D, G., G, A., S, C., & SA, P. (2022). Correlates of protection against SARS-CoV-2 infection and COVID-19 disease.. doi.org. https://doi.org/10.1111/imr.13091

P-1948. Differential Patterns of Protection from Natural Infection against SARS-CoV-2 Reinfection in the Pre-Omicron and Omicron Eras
2025
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Chemaitelly, H., Ayoub, H. H., & Abu-Raddad, L. J. (2025). P-1948. Differential Patterns of Protection from Natural Infection against SARS-CoV-2 Reinfection in the Pre-Omicron and Omicron Eras. doi.org. https://doi.org/10.1093/ofid/ofae631.2107

A Systematic Review of the Protective Effect of Prior SARS-CoV-2 Infection on Repeat Infection.
2021
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N, K., NK, S., & JD, K. (2021). A Systematic Review of the Protective Effect of Prior SARS-CoV-2 Infection on Repeat Infection.. doi.org. https://doi.org/10.1177/01632787211047932

SARS-CoV-2 reinfections: Overview of efficacy and duration of natural and hybrid immunity -
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SARS-CoV-2 reinfections: Overview of efficacy and duration of natural and hybrid immunity - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1016/j.envres.2022.112911

SARS-CoV-2 seroprevalence and infection rate in Manila, Philippines prior to national vaccination program implementation: a repeated cross-sectional analysis
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SARS-CoV-2 seroprevalence and infection rate in Manila, Philippines prior to national vaccination program implementation: a repeated cross-sectional analysis. (n.d.). cir.nii.ac.jp. https://doi.org/10.1186/s41182-022-00468-7

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