Something you may or may not know about me is that my first experience with death was when my grandmother died of glioblastoma just before I turned 7.

This research isn't dispositive, but even the results they've seen so far constitute utterly amazing news.
https://ufhealth.org/news/2024/uf-developed-mrna-vaccine-triggers-fierce-immune-response-to-fight-malignant-brain-tumor