This is something I’ve been following for a couple months now and is starting to get some widespread attention:
Basically, you take some white blood cells (called ‘T-cells’) from a patient’s body, modify their genes using a fragment of the HIV virus (!) to make them cancer-killing machines, and then re-insert them into the patient’s body. The T-cells then multiply and attack the cancer in a way that the un-altered T-cells would not.
The “early-days” results against leukemia patients have been astonishing, with an 83% remission rate (and with 66% remaining cancer-free).
The down-side is that the therapy is necessarily bespoke. It’s never going to be a pill you can stock in a pharmacy. And although the $ half-million per-person price tag will surely come down, it’ll probably never be a cheap process.