A prominent British oncologist who testified before the United States Senate is sounding the alarm — claiming that mRNA COVID-19 vaccines are directly linked to cancer. His name is Dr. Angus Dalgleish, and what he’s saying is worth hearing.
Who is Dr. Angus Dalgleish?
Dr. Dalgleish is not a fringe figure. He is a British oncologist and professor emeritus of oncology at St George’s, University of London. He pioneered immunotherapy treatments for melanoma over 25 years ago — long before mainstream medicine accepted the approach. He testified alongside Dr. Wafik El-Deiry of Brown University, whose peer-reviewed research published in Oncotarget in January 2026 concluded that “the collective worldwide evidence from 2020–2025 underscores a biologically plausible connection between COVID-19 vaccination and cancer.”
What Is He Saying?
In a recent interview, Dr. Dalgleish laid out his case plainly. He observed long-term stable cancer patients — some in remission for up to 18 years — suddenly relapsing after receiving booster vaccines. Six patients relapsed in six weeks. All had been pushed by their doctors to get boosted.
He points to a few core mechanisms:
T-Cell Exhaustion — Research out of Madrid documented T-cell collapse in cancer patients after a third COVID vaccine dose. T-cells are what keep cancer in check, especially in patients who’ve responded to immunotherapy. Lose those, and the brakes come off.
IgG4 Class Switching — Peer-reviewed research published in Science Immunology, the Journal of Infection, and Frontiers in Immunology has documented that repeated mRNA vaccine doses cause the immune system to shift toward IgG4 antibodies. IgG4 is associated with immune tolerance — essentially training your immune system to stand down. This reduces your body’s ability to identify and destroy cancer cells through a process called antibody-dependent cellular cytotoxicity (ADCC).
Reverse Transcription and DNA Integration — Dr. Dalgleish and the immunologist interviewed alongside him describe a process where the modified mRNA can reverse transcribe into DNA and integrate randomly into your genome. If it lands near a gene that promotes cell growth, it can switch that gene on permanently. If it lands near a tumor suppressor gene, it can shut it off. Either outcome can lead to cancer.
He says his team has identified at least 12 distinct mechanisms by which these vaccines can induce or promote cancer.
“Turbo Cancer”
The term “turbo cancer” has been used to describe what doctors are seeing — cancers that skip the normal progression of stage 1 or 2 and show up immediately at stage 4. Surgeons have reported patients presenting with metastasis in the liver and lungs instead of localized, treatable tumors. And they’re showing up in younger patients.
Dr. Dalgleish says this pattern aligns with hyper-progressive cancer, a phenomenon already recognized in immunology.
Who Is At Highest Risk?
Based on the available research and Dr. Dalgleish’s testimony:
- Cancer patients who received multiple boosters — particularly those previously controlled through immunotherapy
- Immunocompromised individuals — already weakened immune surveillance compounded by IgG4 shifting
- People who received 4 or more mRNA doses — the IgG4 shift is cumulative and dose-dependent
- Elderly individuals (65+) — age-related immune decline makes additional suppression more dangerous
- Children aged 5–11 — research has documented the IgG4 class switch occurring after just two pediatric doses
Who Is Probably at Lower Risk?
- People who received the Johnson & Johnson vaccine — it used adenoviral vector technology, not mRNA. The IgG4 class switch has not been reported with this vaccine type.
- People who received only the initial two-dose mRNA series without boosters — the immune shift begins months after the second dose but appears to be significantly less severe than in those who received 3 or more doses
- People with strong baseline immune systems who did not receive additional boosters
Hear It For Yourself
We encourage you to watch the full interview and draw your own conclusions.
A Note To Our Readers
Dr. Dalgleish states clearly in this interview that these are his professional opinions, backed by research and clinical observation over several years. He cites peer-reviewed studies, Japanese national statistics data, and his own clinical experience treating cancer patients for decades. Independent researchers at Brown University and Tufts University have published findings that corroborate several of his concerns.
This article is reporting what a credentialed medical professional is saying publicly and before the United States Senate. It is not making medical claims or advising for or against vaccination. If you have concerns about your health, speak with a medical professional you trust.