I found this book, which traces the surprisingly long and fascinating history of using immunotherapy to treat cancer up to the present day, well, fascinating:

The Breakthrough: Immunotherapy and the Race to Cure Cancer - Wikipedia https://en.wikipedia.org/wiki/The_Breakthrough:_Immunotherap...

My uncle died of a glioblastoma, and shortly after I read this book, I was myself diagnosed with cancer (treated conventionally, hopefully cured). Immunotherapies like mRNA vaccines seem to be our best hope for finding reliable, permanent cures for a lot of different cancers. I am sorry that for many of our loved ones, a cure will have come too late.