Wednesday, October 1, 2025

Vaccine Cancer Risk (John Campbell)


1-year risks of cancers associated with COVID-19 vaccination: a large population-based cohort study in South Korea

Between 2021 and 2023

Korean National Health Insurance database.

The participants were categorized into two groups based on their COVID-19 vaccination status.

Cancers significantly increased, 1 year post-vaccination




An overall 27% increased risk. This is only for the two year study period ending in 2023. Continued monitoring is needed. Dr Campbell mentions other adverse events not covered by this study that include blood clots. 

[Posted at the SpookyWeather2 blog, October 1, 2025.]

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