IIRC, BioNTech was developing mRNAs for cancer and converted it to a covid vax. That's why the Pfizer vax was produced so quickly.
BioNTech, the German company that developed Pfizer's mRNA covid-19 vaccine, is now testing whether mRNAs can be used to treat cancer.
https://www.newscientist.com/article/2289334-mrna-cancer-therapy-now-in-human-trials-after-shrinking-mouse-tumours/
Seems huge, awesome.
I've been thinking (hoping) we would likely make some large medical strides from fighting covid so intensively.