Covid jab caused 35% increased risk of thyroid cancer, risk rose to 53% and 68% for lung and prostate cancers respectively – Korean study | 29 Sept 2025 | Covid vaccines may raise the risk of certain cancers, a study has claimed. Korean researchers said they found proof the jabs raised the risk of six types of cancer including lung, breast and prostate. The fresh study was published in the journal Biomarker Research, owned by Springer Nature which produces some of the world’s most prestigious scientific journals. Medics hypothesised that after a year, those who had taken at least one Covid jab had a 35 per cent increased risk of being diagnosed with thyroid cancer and 34 per cent risk of gastric cancer. This risk rose to 53 and 68 per cent for lung and prostate cancers respectively. Breast and colorectal cancers, meanwhile, had an increased risk of 20 and 28 percent respectively, the medics claimed. Writing in the journal, they said “cDNA vaccines were associated with the increased risks of thyroid, gastric, colorectal, lung, and prostate cancers.”