Your data point is true for small molecule drugs in general and injecting tumors is not new, BUT we have recently made progress with humans injecting variants of the polio virus into human brain tumors , CAR-T (Google JUNO & KITE), and treatments based on biologics and genetic information is exploding.
To go from the animal study to people is 3-6 years, and the current success rates for biologics from animals to preclinical is about 8%.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3902221/
The eventual approval rate for biologics in Phase 1 is from 5% to 26.1% depending on the indication (p. 8 in the attached report)
https://www.bio.org/sites/default/files/Clinical%20Developme…
While it’s not a done deal and while it is dicey to presume this will a treatment anytime soon, we have come a LONG way from the 1000:1 odds. This therapy, the outcome, and the way that the biologic attacked the cancer is stunning. I wouldn’t be surprised if we are discussing clinical results on this within 5 years.
Odds are getting better, a lot better, every day.
Best,
bulwnkl