Question 415 of 433
Are cancer vaccines real?
The short answer
Yes. Personalized vaccines built from a patient’s own tumor have now succeeded in a Phase 3 trial in melanoma.
These use the same mRNA technology as the COVID vaccines. A sample of the tumor is sequenced, and a vaccine is made that teaches the immune system to recognize that one patient’s cancer. In people with high-risk melanoma that had been surgically removed, adding the vaccine to standard immune therapy cut the risk of recurrence or death by about half over five years in a mid-stage trial. In August 2026 the companies announced that the larger confirming trial had met its goals. Trials are under way in lung, kidney, bladder, and pancreatic cancer.
These treat people who already have cancer. Vaccines that prevent cancer in healthy people, beyond HPV and hepatitis B, are much further off.
“This book is for education. It is not medical advice, and reading it does not make you my patient or create a doctor-patient relationship.” From the book’s medical disclaimer. Full disclaimer
HUMAN TRIALS / SPONSOR TOPLINE — Resected high-risk melanoma: individualized vaccine plus immunotherapy; not general cancer prevention.Evidence grade (draft mapping)Grade pendingPart 28, Q415 · Sources: R16
Sources cited
- R16 Merck and Moderna. Phase 3 INTerpath-001 trial of intismeran autogene plus pembrolizumab met recurrence-free and distant metastasis-free survival endpoints. August 19, 2026. Link pending verification
From Longevity Unmasked by Afshine Ash Emrani, MD, FACC. Medical disclaimer. This book is for education. It is not medical advice, and reading it does not make you my patient or create a doctor-patient relationship. Nothing here is meant to diagnose, treat, cure, or prevent any disease. Medicine is personal: a test, drug, supplement, or exercise plan that helps one person can harm another. Do not start, stop, or change any medication or treatment because of something you read in these pages. Talk with a licensed clinician who knows your history first. If you think you are having a medical emergency, call 911. The author disclaims responsibility for any loss or harm arising from use of the information in this book.