The mRNA Cancer Vaccine Worked. So Why Can't You Get It Yet?

On 19 August 2026, Moderna and Merck said their personalised mRNA cancer vaccine had passed a phase 3 trial in 1,137 people with melanoma, a first for mRNA. But how much it helped still hasn't been published: the numbers are due in Madrid on 24 October. How each dose is built from a patient's own tumour, who it is really for, and what the famous 49% means. Plus Britain: nine NHS hospitals, a 10,000-patient promise that was never about this vaccine, and the road through MHRA and NICE. About the numbers (checked 28 Sep 2026): the 49% comes from the earlier phase 2b trial (157 patients), not from phase 3, whose results are not public yet. No application for approval and no price have been announced. Keytruda costs £2,630 a vial at NICE list price; almost £95,000 a year at the trial dose is our own sum, and the NHS pays a confidential, lower price. Not medical advice. This is not a cure or a preventive vaccine: it was tested to lower the risk of melanoma coming back after surgery. If you or someone you love has melanoma, talk to your oncologist. I'm Arthur Vale. This is Science Aftermath: the stories that begin where the headlines end. CHAPTERS 0:00 A cancer vaccine made for one patient 0:44 Melanoma in the UK 1:17 An announcement with no numbers 1:42 135 years: Coley's experiment 2:22 The discovery behind mRNA vaccines 3:35 Where the 49% comes from 4:11 The missing number: 24 October 4:35 Made for one 5:03 How it is built from your own tumour 7:01 The small print: who is it for? 7:31 What 49% means in plain numbers 9:31 Britain's bet 10:23 The 10,000-patient promise 11:08 BioNTech stops a trial 11:37 Approval: MHRA and NICE 12:06 The bill 12:37 The answer 13:55 What exists for patients today SOURCES Phase 3 result (Moderna and Merck, 19 Aug 2026): https://news.modernatx.com/merck-and-... Trial registry: https://clinicaltrials.gov/study/NCT0... ESMO 2026 date: https://www.biospace.com/press-releas... Phase 2b trial, The Lancet: https://www.thelancet.com/journals/la... NHS Cancer Vaccine Launch Pad: https://www.england.nhs.uk/2024/05/th... BioNTech ends bowel cancer trial: https://www.pharmexec.com/view/bionte... Keytruda price, NICE: https://www.nice.org.uk/guidance/ta837 Also: Merck, STAT, The ASCO Post, BioPharma Dive, Science Media Centre, UCLH, NIHR, Cancer Research UK, DHSC, NobelPrize.org MUSIC By Chris Zabriskie (chriszabriskie.com), CC BY 4.0: "Divider", "Stories About the World That Once Was", "Cylinder Five", "CGI Snake", "Virtues Inherited, Vices Passed On", "Everyone Will Notice, No One Will Say Anything", "I Should Have Been More Human" "Ambient Documentary Build Up #02" by tyops, CC BY 4.0, https://freesound.org/s/437317/ Edited for length and mixed under the narration. Licence: https://creativecommons.org/licenses/... Also (CC0, Freesound): "Suspenseful Strings Music 01" by Magmi.Soundtracks, "Tension Drones" by Vospi. Sound effects: Mixkit and Freesound (CC0). FOOTAGE AND PHOTOS Stock video: Coverr and Mixkit (free licences) "London's Air Ambulance (G-LAAB) Take-Off Ruskin Park" and "Kent Surrey Sussex Air Ambulance (G-LNAC) Take-off" by Celsoazevedo, CC BY 4.0 "Portrait of William Coley (Wellcome M0017955)" by Wellcome Collection, CC BY 4.0 "Katalin Karikó at the US Embassy Sweden, 2023 Nobel Reception" and "US Embassy Sweden 2023 Nobel Reception" (3 photos) by US Embassy Sweden, CC BY 2.0 "Drew Weissman Life Science medalist" by Thorne Media, CC BY 3.0 "Diamond Light Synchrotron - Rutherford Appleton Lab, UK" by Umbra Lab, Inc., CC BY 4.0 "University College Hospital London" by morebyless, CC BY 2.0 "T Lymphocyte, also known as a T cell" by NIAID, CC BY 2.0 "Nanopore Sequencing" by NHGRI, CC BY 2.0 Public domain or CC0: "William Bradley Coley 56431240R", "William Coley 1892", "The Royal Marsden Hospital frontage Fulham Road (1)", "Killer T cells surround a cancer cell", "Killer T cells", "3D melanoma cell", "Metastatic Melanoma Cells", "Melanoma (2)", "Asymmetrical melanoma", "Melanoma with color differences", "Melanoma (6)" Photos: Wikimedia Commons; cropped, darkened or slowly zoomed. Licences: https://creativecommons.org/licenses/..., https://creativecommons.org/licenses/..., https://creativecommons.org/licenses/... AI DISCLOSURE Some images and clips were generated with AI (Google Flow) to illustrate the story; the people in them are fictional, not the real patients, doctors, hospitals or medicines described. The narration is a synthetic AI voice, and the narrator, Arthur Vale, is an AI-generated persona, not a doctor or scientist. #mRNA #CancerVaccine #Melanoma #NHS