Kuala Lampur, July 13 -- For decades, the phrase "cancer vaccine" was the punchline of oncology conferences. We poured billions into stimulating T cells against tumours, only to watch those T cells get exhausted, ignored, or lost. The dream felt like a cruel joke: the immune system, which so elegantly clears viruses, seemed blind to the mutinous cells arising within us.

But if the 2026 review by Haanen, Schumacher, Kagan, Fritsch, and Wu in Nature Medicine makes one thing painfully clear, the joke is over. We are not just entering the era of cancer vaccines; we are realising that our previous failures were due to treating vaccines like simple drugs rather than complex biological reprogramming events.

The review systematically dismantles...