The claim
A South Korean study found that COVID-19 vaccines caused cancer
Original publisher’s rating
Missing Context
Reviewed by Factcrescendo Sri Lanka ↗ ·
Read the original fact check ↗Original review summary
The review says the South Korean observational study found statistical associations between vaccination and six cancer types, but no statistically significant increase across all cancers. It says the study does not establish that vaccines cause cancer and notes its short follow-up and potential for bias.[S1]
Additional context
The study was published on 26 September 2025 and analyzed records for more than 8.4 million people from 2021 to 2023. [S1]
Research date:
Sources and attribution
- [S1] Factcrescendo Sri Lanka original review
Original review · Retrieved October 16, 2026
Original review: Factcrescendo Sri Lanka. Structured data compiled by Data Commons under CC BY 4.0. Publisher article content is subject to its own terms. Summaries and context are produced by PeakMetrics with AI assistance.
Updated